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Finding the Fourth Proportional to 526,499.80, 788,583.30 and 407,786.20

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Solution

The fourth proportional to 526,499.80, 788,583.30 and 407,786.20 is: 610,775.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    526,499.80 : 788,583.30 = 407,786.20 : x
  2. Step 2: Convert to fraction form
    526,499.80/788,583.30 = 407,786.20/x
  3. Step 3: Cross multiply
    526,499.80x = 788,583.30 × 407,786.20
  4. Step 4: Simplify right side
    526,499.80x = 321,573,387,290.46
  5. Step 5: Solve for x
    x = 321,573,387,290.46/526,499.80
  6. Step 6: Final answer
    x = 610,775.90

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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.