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Finding the Fourth Proportional to 586,616.31, 809,530.52 and 318,344.31

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Solution

The fourth proportional to 586,616.31, 809,530.52 and 318,344.31 is: 439,315.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    586,616.31 : 809,530.52 = 318,344.31 : x
  2. Step 2: Convert to fraction form
    586,616.31/809,530.52 = 318,344.31/x
  3. Step 3: Cross multiply
    586,616.31x = 809,530.52 × 318,344.31
  4. Step 4: Simplify right side
    586,616.31x = 257,709,434,813.34
  5. Step 5: Solve for x
    x = 257,709,434,813.34/586,616.31
  6. Step 6: Final answer
    x = 439,315.15

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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.