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Finding the Fourth Proportional to 615.31, 849.51 and 505.06

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Solution

The fourth proportional to 615.31, 849.51 and 505.06 is: 697.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.31 : 849.51 = 505.06 : x
  2. Step 2: Convert to fraction form
    615.31/849.51 = 505.06/x
  3. Step 3: Cross multiply
    615.31x = 849.51 × 505.06
  4. Step 4: Simplify right side
    615.31x = 429,053.52
  5. Step 5: Solve for x
    x = 429,053.52/615.31
  6. Step 6: Final answer
    x = 697.30

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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.