Home / 747,987.40-1,121,981.10-432,281.80

Finding the Fourth Proportional to 747,987.40, 1,121,981.10 and 432,281.80

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Solution

The fourth proportional to 747,987.40, 1,121,981.10 and 432,281.80 is: 648,422.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    747,987.40 : 1,121,981.10 = 432,281.80 : x
  2. Step 2: Convert to fraction form
    747,987.40/1,121,981.10 = 432,281.80/x
  3. Step 3: Cross multiply
    747,987.40x = 1,121,981.10 × 432,281.80
  4. Step 4: Simplify right side
    747,987.40x = 485,012,009,473.98
  5. Step 5: Solve for x
    x = 485,012,009,473.98/747,987.40
  6. Step 6: Final answer
    x = 648,422.70

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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.