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Finding the Fourth Proportional to 644,117.40, 966,176.10 and 378,396.90

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Solution

The fourth proportional to 644,117.40, 966,176.10 and 378,396.90 is: 567,595.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,117.40 : 966,176.10 = 378,396.90 : x
  2. Step 2: Convert to fraction form
    644,117.40/966,176.10 = 378,396.90/x
  3. Step 3: Cross multiply
    644,117.40x = 966,176.10 × 378,396.90
  4. Step 4: Simplify right side
    644,117.40x = 365,598,041,094.09
  5. Step 5: Solve for x
    x = 365,598,041,094.09/644,117.40
  6. Step 6: Final answer
    x = 567,595.35

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.