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Finding the Fourth Proportional to 586.31, 877.31 and 413.40

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Solution

The fourth proportional to 586.31, 877.31 and 413.40 is: 618.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    586.31 : 877.31 = 413.40 : x
  2. Step 2: Convert to fraction form
    586.31/877.31 = 413.40/x
  3. Step 3: Cross multiply
    586.31x = 877.31 × 413.40
  4. Step 4: Simplify right side
    586.31x = 362,681.56
  5. Step 5: Solve for x
    x = 362,681.56/586.31
  6. Step 6: Final answer
    x = 618.58

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.