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Finding the Fourth Proportional to 888,390, 1,226,007.45 and 485,982

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Solution

The fourth proportional to 888,390, 1,226,007.45 and 485,982 is: 670,671.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    888,390 : 1,226,007.45 = 485,982 : x
  2. Step 2: Convert to fraction form
    888,390/1,226,007.45 = 485,982/x
  3. Step 3: Cross multiply
    888,390x = 1,226,007.45 × 485,982
  4. Step 4: Simplify right side
    888,390x = 595,817,552,565.90
  5. Step 5: Solve for x
    x = 595,817,552,565.90/888,390
  6. Step 6: Final answer
    x = 670,671.16

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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.