Home / 870,922.20-1,306,811.28-391,488.74

Finding the Fourth Proportional to 870,922.20, 1,306,811.28 and 391,488.74

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Solution

The fourth proportional to 870,922.20, 1,306,811.28 and 391,488.74 is: 587,425.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,922.20 : 1,306,811.28 = 391,488.74 : x
  2. Step 2: Convert to fraction form
    870,922.20/1,306,811.28 = 391,488.74/x
  3. Step 3: Cross multiply
    870,922.20x = 1,306,811.28 × 391,488.74
  4. Step 4: Simplify right side
    870,922.20x = 511,601,901,424.99
  5. Step 5: Solve for x
    x = 511,601,901,424.99/870,922.20
  6. Step 6: Final answer
    x = 587,425.49

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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.