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Finding the Fourth Proportional to 656,221.30, 919,331.90 and 656,221.30

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Solution

The fourth proportional to 656,221.30, 919,331.90 and 656,221.30 is: 919,331.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,221.30 : 919,331.90 = 656,221.30 : x
  2. Step 2: Convert to fraction form
    656,221.30/919,331.90 = 656,221.30/x
  3. Step 3: Cross multiply
    656,221.30x = 919,331.90 × 656,221.30
  4. Step 4: Simplify right side
    656,221.30x = 603,285,174,549.47
  5. Step 5: Solve for x
    x = 603,285,174,549.47/656,221.30
  6. Step 6: Final answer
    x = 919,331.90

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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 (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.