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Finding the Fourth Proportional to 616.34, 849.57 and 420.14

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Solution

The fourth proportional to 616.34, 849.57 and 420.14 is: 579.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    616.34 : 849.57 = 420.14 : x
  2. Step 2: Convert to fraction form
    616.34/849.57 = 420.14/x
  3. Step 3: Cross multiply
    616.34x = 849.57 × 420.14
  4. Step 4: Simplify right side
    616.34x = 356,938.34
  5. Step 5: Solve for x
    x = 356,938.34/616.34
  6. Step 6: Final answer
    x = 579.13

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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.