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Finding the Fourth Proportional to 586,617.28, 809,531.82 and 318,345.28

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Solution

The fourth proportional to 586,617.28, 809,531.82 and 318,345.28 is: 439,316.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    586,617.28 : 809,531.82 = 318,345.28 : x
  2. Step 2: Convert to fraction form
    586,617.28/809,531.82 = 318,345.28/x
  3. Step 3: Cross multiply
    586,617.28x = 809,531.82 × 318,345.28
  4. Step 4: Simplify right side
    586,617.28x = 257,710,633,906.81
  5. Step 5: Solve for x
    x = 257,710,633,906.81/586,617.28
  6. Step 6: Final answer
    x = 439,316.47

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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.