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Finding the Fourth Proportional to 615.61, 848.91 and 429.31

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Solution

The fourth proportional to 615.61, 848.91 and 429.31 is: 592.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.61 : 848.91 = 429.31 : x
  2. Step 2: Convert to fraction form
    615.61/848.91 = 429.31/x
  3. Step 3: Cross multiply
    615.61x = 848.91 × 429.31
  4. Step 4: Simplify right side
    615.61x = 364,445.55
  5. Step 5: Solve for x
    x = 364,445.55/615.61
  6. Step 6: Final answer
    x = 592.01

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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.