Home / 1,218,197,612.70-1,681,108,022.43-661,275,788.22

Finding the Fourth Proportional to 1,218,197,612.70, 1,681,108,022.43 and 661,275,788.22

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Solution

The fourth proportional to 1,218,197,612.70, 1,681,108,022.43 and 661,275,788.22 is: 912,558,045.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,218,197,612.70 : 1,681,108,022.43 = 661,275,788.22 : x
  2. Step 2: Convert to fraction form
    1,218,197,612.70/1,681,108,022.43 = 661,275,788.22/x
  3. Step 3: Cross multiply
    1,218,197,612.70x = 1,681,108,022.43 × 661,275,788.22
  4. Step 4: Simplify right side
    1,218,197,612.70x = 1,111,676,032,615,363,840
  5. Step 5: Solve for x
    x = 1,111,676,032,615,363,840/1,218,197,612.70
  6. Step 6: Final answer
    x = 912,558,045.61

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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.