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Finding the Fourth Proportional to 523,219.70, 784,829.55 and 487,790.30

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Solution

The fourth proportional to 523,219.70, 784,829.55 and 487,790.30 is: 731,685.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    523,219.70 : 784,829.55 = 487,790.30 : x
  2. Step 2: Convert to fraction form
    523,219.70/784,829.55 = 487,790.30/x
  3. Step 3: Cross multiply
    523,219.70x = 784,829.55 × 487,790.30
  4. Step 4: Simplify right side
    523,219.70x = 382,832,241,643.37
  5. Step 5: Solve for x
    x = 382,832,241,643.37/523,219.70
  6. Step 6: Final answer
    x = 731,685.45

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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.