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Finding the Fourth Proportional to 911,954,367.20, 1,367,798,840.40 and 265,654,719.20

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Solution

The fourth proportional to 911,954,367.20, 1,367,798,840.40 and 265,654,719.20 is: 398,443,419.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,954,367.20 : 1,367,798,840.40 = 265,654,719.20 : x
  2. Step 2: Convert to fraction form
    911,954,367.20/1,367,798,840.40 = 265,654,719.20/x
  3. Step 3: Cross multiply
    911,954,367.20x = 1,367,798,840.40 × 265,654,719.20
  4. Step 4: Simplify right side
    911,954,367.20x = 363,362,216,868,547,648
  5. Step 5: Solve for x
    x = 363,362,216,868,547,648/911,954,367.20
  6. Step 6: Final answer
    x = 398,443,419.91

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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.