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Finding the Fourth Proportional to 715,995.36, 988,077.15 and 393,726.24

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Solution

The fourth proportional to 715,995.36, 988,077.15 and 393,726.24 is: 543,344.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,995.36 : 988,077.15 = 393,726.24 : x
  2. Step 2: Convert to fraction form
    715,995.36/988,077.15 = 393,726.24/x
  3. Step 3: Cross multiply
    715,995.36x = 988,077.15 × 393,726.24
  4. Step 4: Simplify right side
    715,995.36x = 389,031,901,099.42
  5. Step 5: Solve for x
    x = 389,031,901,099.42/715,995.36
  6. Step 6: Final answer
    x = 543,344.17

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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.