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Finding the Fourth Proportional to 586,578.89, 809,478.85 and 318,306.89

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Solution

The fourth proportional to 586,578.89, 809,478.85 and 318,306.89 is: 439,263.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    586,578.89 : 809,478.85 = 318,306.89 : x
  2. Step 2: Convert to fraction form
    586,578.89/809,478.85 = 318,306.89/x
  3. Step 3: Cross multiply
    586,578.89x = 809,478.85 × 318,306.89
  4. Step 4: Simplify right side
    586,578.89x = 257,662,695,264.28
  5. Step 5: Solve for x
    x = 257,662,695,264.28/586,578.89
  6. Step 6: Final answer
    x = 439,263.50

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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.