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Finding the Fourth Proportional to 522,965.80, 784,448.70 and 345,818.80

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Solution

The fourth proportional to 522,965.80, 784,448.70 and 345,818.80 is: 518,728.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,965.80 : 784,448.70 = 345,818.80 : x
  2. Step 2: Convert to fraction form
    522,965.80/784,448.70 = 345,818.80/x
  3. Step 3: Cross multiply
    522,965.80x = 784,448.70 × 345,818.80
  4. Step 4: Simplify right side
    522,965.80x = 271,277,108,095.56
  5. Step 5: Solve for x
    x = 271,277,108,095.56/522,965.80
  6. Step 6: Final answer
    x = 518,728.20

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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.