Home / 1,217,941,734.40-1,680,761,215.26-661,024,781.44

Finding the Fourth Proportional to 1,217,941,734.40, 1,680,761,215.26 and 661,024,781.44

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Solution

The fourth proportional to 1,217,941,734.40, 1,680,761,215.26 and 661,024,781.44 is: 912,215,078.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,217,941,734.40 : 1,680,761,215.26 = 661,024,781.44 : x
  2. Step 2: Convert to fraction form
    1,217,941,734.40/1,680,761,215.26 = 661,024,781.44/x
  3. Step 3: Cross multiply
    1,217,941,734.40x = 1,680,761,215.26 × 661,024,781.44
  4. Step 4: Simplify right side
    1,217,941,734.40x = 1,111,024,814,970,070,400
  5. Step 5: Solve for x
    x = 1,111,024,814,970,070,400/1,217,941,734.40
  6. Step 6: Final answer
    x = 912,215,078.60

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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.