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Finding the Fourth Proportional to 870,378.24, 1,305,290.88 and 279,264

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Solution

The fourth proportional to 870,378.24, 1,305,290.88 and 279,264 is: 418,807.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,378.24 : 1,305,290.88 = 279,264 : x
  2. Step 2: Convert to fraction form
    870,378.24/1,305,290.88 = 279,264/x
  3. Step 3: Cross multiply
    870,378.24x = 1,305,290.88 × 279,264
  4. Step 4: Simplify right side
    870,378.24x = 364,520,752,312.32
  5. Step 5: Solve for x
    x = 364,520,752,312.32/870,378.24
  6. Step 6: Final answer
    x = 418,807.29

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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.