Home / 718,741,118.52-991,862,742.80-388,716,257.16

Finding the Fourth Proportional to 718,741,118.52, 991,862,742.80 and 388,716,257.16

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Solution

The fourth proportional to 718,741,118.52, 991,862,742.80 and 388,716,257.16 is: 536,428,434.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,741,118.52 : 991,862,742.80 = 388,716,257.16 : x
  2. Step 2: Convert to fraction form
    718,741,118.52/991,862,742.80 = 388,716,257.16/x
  3. Step 3: Cross multiply
    718,741,118.52x = 991,862,742.80 × 388,716,257.16
  4. Step 4: Simplify right side
    718,741,118.52x = 385,553,172,997,667,776
  5. Step 5: Solve for x
    x = 385,553,172,997,667,776/718,741,118.52
  6. Step 6: Final answer
    x = 536,428,434.47

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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.