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Finding the Fourth Proportional to 518,905.20, 778,357.80 and 144,928.20

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Solution

The fourth proportional to 518,905.20, 778,357.80 and 144,928.20 is: 217,392.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,905.20 : 778,357.80 = 144,928.20 : x
  2. Step 2: Convert to fraction form
    518,905.20/778,357.80 = 144,928.20/x
  3. Step 3: Cross multiply
    518,905.20x = 778,357.80 × 144,928.20
  4. Step 4: Simplify right side
    518,905.20x = 112,805,994,909.96
  5. Step 5: Solve for x
    x = 112,805,994,909.96/518,905.20
  6. Step 6: Final answer
    x = 217,392.30

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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.