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Finding the Fourth Proportional to 526,500.80, 788,584.80 and 407,787.20

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Solution

The fourth proportional to 526,500.80, 788,584.80 and 407,787.20 is: 610,777.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    526,500.80 : 788,584.80 = 407,787.20 : x
  2. Step 2: Convert to fraction form
    526,500.80/788,584.80 = 407,787.20/x
  3. Step 3: Cross multiply
    526,500.80x = 788,584.80 × 407,787.20
  4. Step 4: Simplify right side
    526,500.80x = 321,574,787,554.56
  5. Step 5: Solve for x
    x = 321,574,787,554.56/526,500.80
  6. Step 6: Final answer
    x = 610,777.40

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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.