Home / 991,660.80-1,487,491.20-326,726.40

Finding the Fourth Proportional to 991,660.80, 1,487,491.20 and 326,726.40

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Solution

The fourth proportional to 991,660.80, 1,487,491.20 and 326,726.40 is: 490,089.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,660.80 : 1,487,491.20 = 326,726.40 : x
  2. Step 2: Convert to fraction form
    991,660.80/1,487,491.20 = 326,726.40/x
  3. Step 3: Cross multiply
    991,660.80x = 1,487,491.20 × 326,726.40
  4. Step 4: Simplify right side
    991,660.80x = 486,002,644,807.68
  5. Step 5: Solve for x
    x = 486,002,644,807.68/991,660.80
  6. Step 6: Final answer
    x = 490,089.60

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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.