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Finding the Fourth Proportional to 671,659.70, 1,007,489.55 and 620,338.10

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Solution

The fourth proportional to 671,659.70, 1,007,489.55 and 620,338.10 is: 930,507.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    671,659.70 : 1,007,489.55 = 620,338.10 : x
  2. Step 2: Convert to fraction form
    671,659.70/1,007,489.55 = 620,338.10/x
  3. Step 3: Cross multiply
    671,659.70x = 1,007,489.55 × 620,338.10
  4. Step 4: Simplify right side
    671,659.70x = 624,984,153,216.86
  5. Step 5: Solve for x
    x = 624,984,153,216.86/671,659.70
  6. Step 6: Final answer
    x = 930,507.15

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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.