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Finding the Fourth Proportional to 663,288.30, 915,370.29 and 372,991.20

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Solution

The fourth proportional to 663,288.30, 915,370.29 and 372,991.20 is: 514,746.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,288.30 : 915,370.29 = 372,991.20 : x
  2. Step 2: Convert to fraction form
    663,288.30/915,370.29 = 372,991.20/x
  3. Step 3: Cross multiply
    663,288.30x = 915,370.29 × 372,991.20
  4. Step 4: Simplify right side
    663,288.30x = 341,425,062,911.45
  5. Step 5: Solve for x
    x = 341,425,062,911.45/663,288.30
  6. Step 6: Final answer
    x = 514,746.10

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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.