Home / 688,034,899.47-949,461,436.45-420,558,579.88

Finding the Fourth Proportional to 688,034,899.47, 949,461,436.45 and 420,558,579.88

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Solution

The fourth proportional to 688,034,899.47, 949,461,436.45 and 420,558,579.88 is: 580,354,504.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,034,899.47 : 949,461,436.45 = 420,558,579.88 : x
  2. Step 2: Convert to fraction form
    688,034,899.47/949,461,436.45 = 420,558,579.88/x
  3. Step 3: Cross multiply
    688,034,899.47x = 949,461,436.45 × 420,558,579.88
  4. Step 4: Simplify right side
    688,034,899.47x = 399,304,153,368,920,384
  5. Step 5: Solve for x
    x = 399,304,153,368,920,384/688,034,899.47
  6. Step 6: Final answer
    x = 580,354,504.80

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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.