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Finding the Fourth Proportional to 896.34, 1,235.65 and 616.15

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Solution

The fourth proportional to 896.34, 1,235.65 and 616.15 is: 849.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    896.34 : 1,235.65 = 616.15 : x
  2. Step 2: Convert to fraction form
    896.34/1,235.65 = 616.15/x
  3. Step 3: Cross multiply
    896.34x = 1,235.65 × 616.15
  4. Step 4: Simplify right side
    896.34x = 761,345.75
  5. Step 5: Solve for x
    x = 761,345.75/896.34
  6. Step 6: Final answer
    x = 849.39

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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.