Home / 1,217,941,771.40-1,680,761,266.32-661,024,818.44

Finding the Fourth Proportional to 1,217,941,771.40, 1,680,761,266.32 and 661,024,818.44

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Solution

The fourth proportional to 1,217,941,771.40, 1,680,761,266.32 and 661,024,818.44 is: 912,215,129.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217,941,771.40 : 1,680,761,266.32 = 661,024,818.44 : x
  2. Step 2: Convert to fraction form
    1,217,941,771.40/1,680,761,266.32 = 661,024,818.44/x
  3. Step 3: Cross multiply
    1,217,941,771.40x = 1,680,761,266.32 × 661,024,818.44
  4. Step 4: Simplify right side
    1,217,941,771.40x = 1,111,024,910,910,162,560
  5. Step 5: Solve for x
    x = 1,111,024,910,910,162,560/1,217,941,771.40
  6. Step 6: Final answer
    x = 912,215,129.66

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Double scale
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1.5x scale

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.