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Finding the Fourth Proportional to 1,007,478, 1,390,319.64 and 554,767.92

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Solution

The fourth proportional to 1,007,478, 1,390,319.64 and 554,767.92 is: 765,579.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,007,478 : 1,390,319.64 = 554,767.92 : x
  2. Step 2: Convert to fraction form
    1,007,478/1,390,319.64 = 554,767.92/x
  3. Step 3: Cross multiply
    1,007,478x = 1,390,319.64 × 554,767.92
  4. Step 4: Simplify right side
    1,007,478x = 771,304,734,817.95
  5. Step 5: Solve for x
    x = 771,304,734,817.95/1,007,478
  6. Step 6: Final answer
    x = 765,579.73

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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.