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Finding the Fourth Proportional to 715,999.36, 988,082.68 and 393,730.24

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Solution

The fourth proportional to 715,999.36, 988,082.68 and 393,730.24 is: 543,349.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,999.36 : 988,082.68 = 393,730.24 : x
  2. Step 2: Convert to fraction form
    715,999.36/988,082.68 = 393,730.24/x
  3. Step 3: Cross multiply
    715,999.36x = 988,082.68 × 393,730.24
  4. Step 4: Simplify right side
    715,999.36x = 389,038,030,736.24
  5. Step 5: Solve for x
    x = 389,038,030,736.24/715,999.36
  6. Step 6: Final answer
    x = 543,349.69

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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.