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Finding the Fourth Proportional to 1,007,479, 1,390,321.02 and 554,768.92

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Solution

The fourth proportional to 1,007,479, 1,390,321.02 and 554,768.92 is: 765,581.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,007,479 : 1,390,321.02 = 554,768.92 : x
  2. Step 2: Convert to fraction form
    1,007,479/1,390,321.02 = 554,768.92/x
  3. Step 3: Cross multiply
    1,007,479x = 1,390,321.02 × 554,768.92
  4. Step 4: Simplify right side
    1,007,479x = 771,306,890,718.70
  5. Step 5: Solve for x
    x = 771,306,890,718.70/1,007,479
  6. Step 6: Final answer
    x = 765,581.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.