Home / 758,811.20-1,138,216.80-380,897.60

Finding the Fourth Proportional to 758,811.20, 1,138,216.80 and 380,897.60

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Solution

The fourth proportional to 758,811.20, 1,138,216.80 and 380,897.60 is: 571,346.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    758,811.20 : 1,138,216.80 = 380,897.60 : x
  2. Step 2: Convert to fraction form
    758,811.20/1,138,216.80 = 380,897.60/x
  3. Step 3: Cross multiply
    758,811.20x = 1,138,216.80 × 380,897.60
  4. Step 4: Simplify right side
    758,811.20x = 433,544,047,399.68
  5. Step 5: Solve for x
    x = 433,544,047,399.68/758,811.20
  6. Step 6: Final answer
    x = 571,346.40

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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.