Home / 728,711,181.32-1,005,645,411.78-398,678,767.88

Finding the Fourth Proportional to 728,711,181.32, 1,005,645,411.78 and 398,678,767.88

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Solution

The fourth proportional to 728,711,181.32, 1,005,645,411.78 and 398,678,767.88 is: 550,189,820.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    728,711,181.32 : 1,005,645,411.78 = 398,678,767.88 : x
  2. Step 2: Convert to fraction form
    728,711,181.32/1,005,645,411.78 = 398,678,767.88/x
  3. Step 3: Cross multiply
    728,711,181.32x = 1,005,645,411.78 × 398,678,767.88
  4. Step 4: Simplify right side
    728,711,181.32x = 400,929,473,692,625,600
  5. Step 5: Solve for x
    x = 400,929,473,692,625,600/728,711,181.32
  6. Step 6: Final answer
    x = 550,189,820.01

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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.