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Finding the Fourth Proportional to 663,201.47, 915,219.20 and 361,395.47

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Solution

The fourth proportional to 663,201.47, 915,219.20 and 361,395.47 is: 498,726.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,201.47 : 915,219.20 = 361,395.47 : x
  2. Step 2: Convert to fraction form
    663,201.47/915,219.20 = 361,395.47/x
  3. Step 3: Cross multiply
    663,201.47x = 915,219.20 × 361,395.47
  4. Step 4: Simplify right side
    663,201.47x = 330,756,072,937.02
  5. Step 5: Solve for x
    x = 330,756,072,937.02/663,201.47
  6. Step 6: Final answer
    x = 498,726.39

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1.5x scale

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.