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Finding the Fourth Proportional to 656,331.60, 921,663.60 and 656,331.60

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Solution

The fourth proportional to 656,331.60, 921,663.60 and 656,331.60 is: 921,663.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,331.60 : 921,663.60 = 656,331.60 : x
  2. Step 2: Convert to fraction form
    656,331.60/921,663.60 = 656,331.60/x
  3. Step 3: Cross multiply
    656,331.60x = 921,663.60 × 656,331.60
  4. Step 4: Simplify right side
    656,331.60x = 604,916,945,249.76
  5. Step 5: Solve for x
    x = 604,916,945,249.76/656,331.60
  6. Step 6: Final answer
    x = 921,663.60

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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.