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Finding the Fourth Proportional to 839.61, 1,158.53 and 466.55

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Solution

The fourth proportional to 839.61, 1,158.53 and 466.55 is: 643.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    839.61 : 1,158.53 = 466.55 : x
  2. Step 2: Convert to fraction form
    839.61/1,158.53 = 466.55/x
  3. Step 3: Cross multiply
    839.61x = 1,158.53 × 466.55
  4. Step 4: Simplify right side
    839.61x = 540,515.07
  5. Step 5: Solve for x
    x = 540,515.07/839.61
  6. Step 6: Final answer
    x = 643.77

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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.