Home / 744,879.60-1,117,319.40-390,002.40

Finding the Fourth Proportional to 744,879.60, 1,117,319.40 and 390,002.40

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Solution

The fourth proportional to 744,879.60, 1,117,319.40 and 390,002.40 is: 585,003.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    744,879.60 : 1,117,319.40 = 390,002.40 : x
  2. Step 2: Convert to fraction form
    744,879.60/1,117,319.40 = 390,002.40/x
  3. Step 3: Cross multiply
    744,879.60x = 1,117,319.40 × 390,002.40
  4. Step 4: Simplify right side
    744,879.60x = 435,757,247,566.56
  5. Step 5: Solve for x
    x = 435,757,247,566.56/744,879.60
  6. Step 6: Final answer
    x = 585,003.60

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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.