Home / 718,821.60-991,980.72-396,545.28

Finding the Fourth Proportional to 718,821.60, 991,980.72 and 396,545.28

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Solution

The fourth proportional to 718,821.60, 991,980.72 and 396,545.28 is: 547,236.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,821.60 : 991,980.72 = 396,545.28 : x
  2. Step 2: Convert to fraction form
    718,821.60/991,980.72 = 396,545.28/x
  3. Step 3: Cross multiply
    718,821.60x = 991,980.72 × 396,545.28
  4. Step 4: Simplify right side
    718,821.60x = 393,365,272,367.00
  5. Step 5: Solve for x
    x = 393,365,272,367.00/718,821.60
  6. Step 6: Final answer
    x = 547,236.30

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1.5x scale

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.