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Finding the Fourth Proportional to 712.47, 983.16 and 413.66

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Solution

The fourth proportional to 712.47, 983.16 and 413.66 is: 570.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    712.47 : 983.16 = 413.66 : x
  2. Step 2: Convert to fraction form
    712.47/983.16 = 413.66/x
  3. Step 3: Cross multiply
    712.47x = 983.16 × 413.66
  4. Step 4: Simplify right side
    712.47x = 406,689.05
  5. Step 5: Solve for x
    x = 406,689.05/712.47
  6. Step 6: Final answer
    x = 570.82

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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.