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Finding the Fourth Proportional to 715,625.24, 987,570.48 and 388,938.24

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Solution

The fourth proportional to 715,625.24, 987,570.48 and 388,938.24 is: 536,738.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,625.24 : 987,570.48 = 388,938.24 : x
  2. Step 2: Convert to fraction form
    715,625.24/987,570.48 = 388,938.24/x
  3. Step 3: Cross multiply
    715,625.24x = 987,570.48 × 388,938.24
  4. Step 4: Simplify right side
    715,625.24x = 384,103,924,367.16
  5. Step 5: Solve for x
    x = 384,103,924,367.16/715,625.24
  6. Step 6: Final answer
    x = 536,738.93

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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.