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Finding the Fourth Proportional to 658,109.60, 919,487.20 and 658,109.60

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Solution

The fourth proportional to 658,109.60, 919,487.20 and 658,109.60 is: 919,487.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,109.60 : 919,487.20 = 658,109.60 : x
  2. Step 2: Convert to fraction form
    658,109.60/919,487.20 = 658,109.60/x
  3. Step 3: Cross multiply
    658,109.60x = 919,487.20 × 658,109.60
  4. Step 4: Simplify right side
    658,109.60x = 605,123,353,397.12
  5. Step 5: Solve for x
    x = 605,123,353,397.12/658,109.60
  6. Step 6: Final answer
    x = 919,487.20

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.