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Finding the Fourth Proportional to 663,254.48, 915,031.32 and 408,162.80

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Solution

The fourth proportional to 663,254.48, 915,031.32 and 408,162.80 is: 563,104.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,254.48 : 915,031.32 = 408,162.80 : x
  2. Step 2: Convert to fraction form
    663,254.48/915,031.32 = 408,162.80/x
  3. Step 3: Cross multiply
    663,254.48x = 915,031.32 × 408,162.80
  4. Step 4: Simplify right side
    663,254.48x = 373,481,741,083.74
  5. Step 5: Solve for x
    x = 373,481,741,083.74/663,254.48
  6. Step 6: Final answer
    x = 563,104.74

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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.