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Finding the Fourth Proportional to 664,687.10, 997,030.65 and 243,908.30

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Solution

The fourth proportional to 664,687.10, 997,030.65 and 243,908.30 is: 365,862.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,687.10 : 997,030.65 = 243,908.30 : x
  2. Step 2: Convert to fraction form
    664,687.10/997,030.65 = 243,908.30/x
  3. Step 3: Cross multiply
    664,687.10x = 997,030.65 × 243,908.30
  4. Step 4: Simplify right side
    664,687.10x = 243,184,050,889.40
  5. Step 5: Solve for x
    x = 243,184,050,889.40/664,687.10
  6. Step 6: Final answer
    x = 365,862.45

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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.