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Finding the Fourth Proportional to 2,758,979.04, 4,138,643.52 and 865,795.20

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Solution

The fourth proportional to 2,758,979.04, 4,138,643.52 and 865,795.20 is: 1,298,747.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,758,979.04 : 4,138,643.52 = 865,795.20 : x
  2. Step 2: Convert to fraction form
    2,758,979.04/4,138,643.52 = 865,795.20/x
  3. Step 3: Cross multiply
    2,758,979.04x = 4,138,643.52 × 865,795.20
  4. Step 4: Simplify right side
    2,758,979.04x = 3,583,217,694,127.10
  5. Step 5: Solve for x
    x = 3,583,217,694,127.10/2,758,979.04
  6. Step 6: Final answer
    x = 1,298,747.70

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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.