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Finding the Fourth Proportional to 870,613.64, 1,305,772.62 and 397,187.72

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Solution

The fourth proportional to 870,613.64, 1,305,772.62 and 397,187.72 is: 595,714.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,613.64 : 1,305,772.62 = 397,187.72 : x
  2. Step 2: Convert to fraction form
    870,613.64/1,305,772.62 = 397,187.72/x
  3. Step 3: Cross multiply
    870,613.64x = 1,305,772.62 × 397,187.72
  4. Step 4: Simplify right side
    870,613.64x = 518,636,849,776.23
  5. Step 5: Solve for x
    x = 518,636,849,776.23/870,613.64
  6. Step 6: Final answer
    x = 595,714.13

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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.