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Finding the Fourth Proportional to 477,964.80, 716,947.20 and 345,772.80

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Solution

The fourth proportional to 477,964.80, 716,947.20 and 345,772.80 is: 518,659.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    477,964.80 : 716,947.20 = 345,772.80 : x
  2. Step 2: Convert to fraction form
    477,964.80/716,947.20 = 345,772.80/x
  3. Step 3: Cross multiply
    477,964.80x = 716,947.20 × 345,772.80
  4. Step 4: Simplify right side
    477,964.80x = 247,900,840,796.16
  5. Step 5: Solve for x
    x = 247,900,840,796.16/477,964.80
  6. Step 6: Final answer
    x = 518,659.20

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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.