Home / 431,628,257.60-647,442,386.40-386,278,625.60

Finding the Fourth Proportional to 431,628,257.60, 647,442,386.40 and 386,278,625.60

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Solution

The fourth proportional to 431,628,257.60, 647,442,386.40 and 386,278,625.60 is: 579,417,938.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,628,257.60 : 647,442,386.40 = 386,278,625.60 : x
  2. Step 2: Convert to fraction form
    431,628,257.60/647,442,386.40 = 386,278,625.60/x
  3. Step 3: Cross multiply
    431,628,257.60x = 647,442,386.40 × 386,278,625.60
  4. Step 4: Simplify right side
    431,628,257.60x = 250,093,155,173,776,128
  5. Step 5: Solve for x
    x = 250,093,155,173,776,128/431,628,257.60
  6. Step 6: Final answer
    x = 579,417,938.40

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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.