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Finding the Fourth Proportional to 663,192.72, 915,207.12 and 361,386.72

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Solution

The fourth proportional to 663,192.72, 915,207.12 and 361,386.72 is: 498,714.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    663,192.72 : 915,207.12 = 361,386.72 : x
  2. Step 2: Convert to fraction form
    663,192.72/915,207.12 = 361,386.72/x
  3. Step 3: Cross multiply
    663,192.72x = 915,207.12 × 361,386.72
  4. Step 4: Simplify right side
    663,192.72x = 330,743,699,217.45
  5. Step 5: Solve for x
    x = 330,743,699,217.45/663,192.72
  6. Step 6: Final answer
    x = 498,714.31

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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.