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Finding the Fourth Proportional to 715,960.50, 988,000.20 and 393,668.34

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Solution

The fourth proportional to 715,960.50, 988,000.20 and 393,668.34 is: 543,248.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,960.50 : 988,000.20 = 393,668.34 : x
  2. Step 2: Convert to fraction form
    715,960.50/988,000.20 = 393,668.34/x
  3. Step 3: Cross multiply
    715,960.50x = 988,000.20 × 393,668.34
  4. Step 4: Simplify right side
    715,960.50x = 388,944,398,653.67
  5. Step 5: Solve for x
    x = 388,944,398,653.67/715,960.50
  6. Step 6: Final answer
    x = 543,248.40

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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.