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Finding the Fourth Proportional to 870,663.60, 1,306,979.55 and 671,865.30

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Solution

The fourth proportional to 870,663.60, 1,306,979.55 and 671,865.30 is: 1,008,557.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,663.60 : 1,306,979.55 = 671,865.30 : x
  2. Step 2: Convert to fraction form
    870,663.60/1,306,979.55 = 671,865.30/x
  3. Step 3: Cross multiply
    870,663.60x = 1,306,979.55 × 671,865.30
  4. Step 4: Simplify right side
    870,663.60x = 878,114,207,454.62
  5. Step 5: Solve for x
    x = 878,114,207,454.62/870,663.60
  6. Step 6: Final answer
    x = 1,008,557.39

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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.