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Finding the Fourth Proportional to 437,502.80, 656,513.40 and 318,875.60

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Solution

The fourth proportional to 437,502.80, 656,513.40 and 318,875.60 is: 478,502.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    437,502.80 : 656,513.40 = 318,875.60 : x
  2. Step 2: Convert to fraction form
    437,502.80/656,513.40 = 318,875.60/x
  3. Step 3: Cross multiply
    437,502.80x = 656,513.40 × 318,875.60
  4. Step 4: Simplify right side
    437,502.80x = 209,346,104,333.04
  5. Step 5: Solve for x
    x = 209,346,104,333.04/437,502.80
  6. Step 6: Final answer
    x = 478,502.32

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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.