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Finding the Fourth Proportional to 509,818.80, 764,728.20 and 433,711.20

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Solution

The fourth proportional to 509,818.80, 764,728.20 and 433,711.20 is: 650,566.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,818.80 : 764,728.20 = 433,711.20 : x
  2. Step 2: Convert to fraction form
    509,818.80/764,728.20 = 433,711.20/x
  3. Step 3: Cross multiply
    509,818.80x = 764,728.20 × 433,711.20
  4. Step 4: Simplify right side
    509,818.80x = 331,671,185,295.84
  5. Step 5: Solve for x
    x = 331,671,185,295.84/509,818.80
  6. Step 6: Final answer
    x = 650,566.80

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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.