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Finding the Fourth Proportional to 585.55, 877.23 and 389.95

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Solution

The fourth proportional to 585.55, 877.23 and 389.95 is: 584.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    585.55 : 877.23 = 389.95 : x
  2. Step 2: Convert to fraction form
    585.55/877.23 = 389.95/x
  3. Step 3: Cross multiply
    585.55x = 877.23 × 389.95
  4. Step 4: Simplify right side
    585.55x = 342,075.84
  5. Step 5: Solve for x
    x = 342,075.84/585.55
  6. Step 6: Final answer
    x = 584.20

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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.