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Finding the Fourth Proportional to 1,398,605,712.60, 1,930,066,064.82 and 763,526,204.32

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Solution

The fourth proportional to 1,398,605,712.60, 1,930,066,064.82 and 763,526,204.32 is: 1,053,660,801.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,398,605,712.60 : 1,930,066,064.82 = 763,526,204.32 : x
  2. Step 2: Convert to fraction form
    1,398,605,712.60/1,930,066,064.82 = 763,526,204.32/x
  3. Step 3: Cross multiply
    1,398,605,712.60x = 1,930,066,064.82 × 763,526,204.32
  4. Step 4: Simplify right side
    1,398,605,712.60x = 1,473,656,016,558,853,632
  5. Step 5: Solve for x
    x = 1,473,656,016,558,853,632/1,398,605,712.60
  6. Step 6: Final answer
    x = 1,053,660,801.81

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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.