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Finding the Fourth Proportional to 788,909.76, 1,088,704.80 and 431,213.76

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Solution

The fourth proportional to 788,909.76, 1,088,704.80 and 431,213.76 is: 595,080.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    788,909.76 : 1,088,704.80 = 431,213.76 : x
  2. Step 2: Convert to fraction form
    788,909.76/1,088,704.80 = 431,213.76/x
  3. Step 3: Cross multiply
    788,909.76x = 1,088,704.80 × 431,213.76
  4. Step 4: Simplify right side
    788,909.76x = 469,464,490,338.05
  5. Step 5: Solve for x
    x = 469,464,490,338.05/788,909.76
  6. Step 6: Final answer
    x = 595,080.09

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.