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Finding the Fourth Proportional to 518,965.20, 778,447.80 and 144,987.60

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Solution

The fourth proportional to 518,965.20, 778,447.80 and 144,987.60 is: 217,481.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,965.20 : 778,447.80 = 144,987.60 : x
  2. Step 2: Convert to fraction form
    518,965.20/778,447.80 = 144,987.60/x
  3. Step 3: Cross multiply
    518,965.20x = 778,447.80 × 144,987.60
  4. Step 4: Simplify right side
    518,965.20x = 112,865,278,247.28
  5. Step 5: Solve for x
    x = 112,865,278,247.28/518,965.20
  6. Step 6: Final answer
    x = 217,481.40

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Half scale
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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.