Home / 431,259,638.40-646,448,558.40-212,573,635.20

Finding the Fourth Proportional to 431,259,638.40, 646,448,558.40 and 212,573,635.20

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Solution

The fourth proportional to 431,259,638.40, 646,448,558.40 and 212,573,635.20 is: 318,643,127.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,259,638.40 : 646,448,558.40 = 212,573,635.20 : x
  2. Step 2: Convert to fraction form
    431,259,638.40/646,448,558.40 = 212,573,635.20/x
  3. Step 3: Cross multiply
    431,259,638.40x = 646,448,558.40 × 212,573,635.20
  4. Step 4: Simplify right side
    431,259,638.40x = 137,417,920,028,887,488
  5. Step 5: Solve for x
    x = 137,417,920,028,887,488/431,259,638.40
  6. Step 6: Final answer
    x = 318,643,127.70

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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.