Home / 990,601.20-1,485,901.80-391,253.85

Finding the Fourth Proportional to 990,601.20, 1,485,901.80 and 391,253.85

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Solution

The fourth proportional to 990,601.20, 1,485,901.80 and 391,253.85 is: 586,880.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,601.20 : 1,485,901.80 = 391,253.85 : x
  2. Step 2: Convert to fraction form
    990,601.20/1,485,901.80 = 391,253.85/x
  3. Step 3: Cross multiply
    990,601.20x = 1,485,901.80 × 391,253.85
  4. Step 4: Simplify right side
    990,601.20x = 581,364,799,971.93
  5. Step 5: Solve for x
    x = 581,364,799,971.93/990,601.20
  6. Step 6: Final answer
    x = 586,880.78

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Double scale
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Similar ratio
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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.