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Finding the Fourth Proportional to 926,920.80, 1,390,510.80 and 394,437.60

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Solution

The fourth proportional to 926,920.80, 1,390,510.80 and 394,437.60 is: 591,711.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    926,920.80 : 1,390,510.80 = 394,437.60 : x
  2. Step 2: Convert to fraction form
    926,920.80/1,390,510.80 = 394,437.60/x
  3. Step 3: Cross multiply
    926,920.80x = 1,390,510.80 × 394,437.60
  4. Step 4: Simplify right side
    926,920.80x = 548,469,742,726.08
  5. Step 5: Solve for x
    x = 548,469,742,726.08/926,920.80
  6. Step 6: Final answer
    x = 591,711.55

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1.5x scale

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.