Home / 1,217,934,057.28-1,680,765,123.36-661,023,780.16

Finding the Fourth Proportional to 1,217,934,057.28, 1,680,765,123.36 and 661,023,780.16

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Solution

The fourth proportional to 1,217,934,057.28, 1,680,765,123.36 and 661,023,780.16 is: 912,221,567.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217,934,057.28 : 1,680,765,123.36 = 661,023,780.16 : x
  2. Step 2: Convert to fraction form
    1,217,934,057.28/1,680,765,123.36 = 661,023,780.16/x
  3. Step 3: Cross multiply
    1,217,934,057.28x = 1,680,765,123.36 × 661,023,780.16
  4. Step 4: Simplify right side
    1,217,934,057.28x = 1,111,025,715,404,515,840
  5. Step 5: Solve for x
    x = 1,111,025,715,404,515,840/1,217,934,057.28
  6. Step 6: Final answer
    x = 912,221,567.96

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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.