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Finding the Fourth Proportional to 438,433.60, 657,650.40 and 318,877.60

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Solution

The fourth proportional to 438,433.60, 657,650.40 and 318,877.60 is: 478,316.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,433.60 : 657,650.40 = 318,877.60 : x
  2. Step 2: Convert to fraction form
    438,433.60/657,650.40 = 318,877.60/x
  3. Step 3: Cross multiply
    438,433.60x = 657,650.40 × 318,877.60
  4. Step 4: Simplify right side
    438,433.60x = 209,709,981,191.04
  5. Step 5: Solve for x
    x = 209,709,981,191.04/438,433.60
  6. Step 6: Final answer
    x = 478,316.40

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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.