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Finding the Fourth Proportional to 563,504.31, 777,631.32 and 308,854.89

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Solution

The fourth proportional to 563,504.31, 777,631.32 and 308,854.89 is: 426,217.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    563,504.31 : 777,631.32 = 308,854.89 : x
  2. Step 2: Convert to fraction form
    563,504.31/777,631.32 = 308,854.89/x
  3. Step 3: Cross multiply
    563,504.31x = 777,631.32 × 308,854.89
  4. Step 4: Simplify right side
    563,504.31x = 240,175,235,799.16
  5. Step 5: Solve for x
    x = 240,175,235,799.16/563,504.31
  6. Step 6: Final answer
    x = 426,217.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.