Home / 781,778,397.79-1,172,666,606.38-199,512,656.39

Finding the Fourth Proportional to 781,778,397.79, 1,172,666,606.38 and 199,512,656.39

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Solution

The fourth proportional to 781,778,397.79, 1,172,666,606.38 and 199,512,656.39 is: 299,268,731.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    781,778,397.79 : 1,172,666,606.38 = 199,512,656.39 : x
  2. Step 2: Convert to fraction form
    781,778,397.79/1,172,666,606.38 = 199,512,656.39/x
  3. Step 3: Cross multiply
    781,778,397.79x = 1,172,666,606.38 × 199,512,656.39
  4. Step 4: Simplify right side
    781,778,397.79x = 233,961,829,698,720,320
  5. Step 5: Solve for x
    x = 233,961,829,698,720,320/781,778,397.79
  6. Step 6: Final answer
    x = 299,268,731.86

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.