Home / 870,618.64-1,305,780.12-397,192.72

Finding the Fourth Proportional to 870,618.64, 1,305,780.12 and 397,192.72

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Solution

The fourth proportional to 870,618.64, 1,305,780.12 and 397,192.72 is: 595,721.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,618.64 : 1,305,780.12 = 397,192.72 : x
  2. Step 2: Convert to fraction form
    870,618.64/1,305,780.12 = 397,192.72/x
  3. Step 3: Cross multiply
    870,618.64x = 1,305,780.12 × 397,192.72
  4. Step 4: Simplify right side
    870,618.64x = 518,646,357,584.73
  5. Step 5: Solve for x
    x = 518,646,357,584.73/870,618.64
  6. Step 6: Final answer
    x = 595,721.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.