Home / 485,416,541.71-728,642,967.08-209,204,067.76

Finding the Fourth Proportional to 485,416,541.71, 728,642,967.08 and 209,204,067.76

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Solution

The fourth proportional to 485,416,541.71, 728,642,967.08 and 209,204,067.76 is: 314,029,415.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,416,541.71 : 728,642,967.08 = 209,204,067.76 : x
  2. Step 2: Convert to fraction form
    485,416,541.71/728,642,967.08 = 209,204,067.76/x
  3. Step 3: Cross multiply
    485,416,541.71x = 728,642,967.08 × 209,204,067.76
  4. Step 4: Simplify right side
    485,416,541.71x = 152,435,072,657,851,776
  5. Step 5: Solve for x
    x = 152,435,072,657,851,776/485,416,541.71
  6. Step 6: Final answer
    x = 314,029,415.07

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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.