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Finding the Fourth Proportional to 586,617.32, 809,531.90 and 318,345.32

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Solution

The fourth proportional to 586,617.32, 809,531.90 and 318,345.32 is: 439,316.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    586,617.32 : 809,531.90 = 318,345.32 : x
  2. Step 2: Convert to fraction form
    586,617.32/809,531.90 = 318,345.32/x
  3. Step 3: Cross multiply
    586,617.32x = 809,531.90 × 318,345.32
  4. Step 4: Simplify right side
    586,617.32x = 257,710,691,755.71
  5. Step 5: Solve for x
    x = 257,710,691,755.71/586,617.32
  6. Step 6: Final answer
    x = 439,316.54

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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.