Home / 644,056.80-966,085.20-378,117.60

Finding the Fourth Proportional to 644,056.80, 966,085.20 and 378,117.60

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Solution

The fourth proportional to 644,056.80, 966,085.20 and 378,117.60 is: 567,176.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,056.80 : 966,085.20 = 378,117.60 : x
  2. Step 2: Convert to fraction form
    644,056.80/966,085.20 = 378,117.60/x
  3. Step 3: Cross multiply
    644,056.80x = 966,085.20 × 378,117.60
  4. Step 4: Simplify right side
    644,056.80x = 365,293,817,219.52
  5. Step 5: Solve for x
    x = 365,293,817,219.52/644,056.80
  6. Step 6: Final answer
    x = 567,176.40

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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.