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Finding the Fourth Proportional to 585,491.72, 807,978.66 and 317,219.72

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Solution

The fourth proportional to 585,491.72, 807,978.66 and 317,219.72 is: 437,763.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    585,491.72 : 807,978.66 = 317,219.72 : x
  2. Step 2: Convert to fraction form
    585,491.72/807,978.66 = 317,219.72/x
  3. Step 3: Cross multiply
    585,491.72x = 807,978.66 × 317,219.72
  4. Step 4: Simplify right side
    585,491.72x = 256,306,764,291.18
  5. Step 5: Solve for x
    x = 256,306,764,291.18/585,491.72
  6. Step 6: Final answer
    x = 437,763.26

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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.