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Finding the Fourth Proportional to 438,434.60, 657,651.90 and 318,878.60

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Solution

The fourth proportional to 438,434.60, 657,651.90 and 318,878.60 is: 478,317.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,434.60 : 657,651.90 = 318,878.60 : x
  2. Step 2: Convert to fraction form
    438,434.60/657,651.90 = 318,878.60/x
  3. Step 3: Cross multiply
    438,434.60x = 657,651.90 × 318,878.60
  4. Step 4: Simplify right side
    438,434.60x = 209,711,117,159.34
  5. Step 5: Solve for x
    x = 209,711,117,159.34/438,434.60
  6. Step 6: Final answer
    x = 478,317.90

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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.