Home / 718,517,349.42-991,366,514.55-420,999,750.24

Finding the Fourth Proportional to 718,517,349.42, 991,366,514.55 and 420,999,750.24

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Solution

The fourth proportional to 718,517,349.42, 991,366,514.55 and 420,999,750.24 is: 580,869,836.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,517,349.42 : 991,366,514.55 = 420,999,750.24 : x
  2. Step 2: Convert to fraction form
    718,517,349.42/991,366,514.55 = 420,999,750.24/x
  3. Step 3: Cross multiply
    718,517,349.42x = 991,366,514.55 × 420,999,750.24
  4. Step 4: Simplify right side
    718,517,349.42x = 417,365,055,021,849,344
  5. Step 5: Solve for x
    x = 417,365,055,021,849,344/718,517,349.42
  6. Step 6: Final answer
    x = 580,869,836.14

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1.5x scale

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.