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Finding the Fourth Proportional to 610.07, 840.96 and 478.85

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Solution

The fourth proportional to 610.07, 840.96 and 478.85 is: 660.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    610.07 : 840.96 = 478.85 : x
  2. Step 2: Convert to fraction form
    610.07/840.96 = 478.85/x
  3. Step 3: Cross multiply
    610.07x = 840.96 × 478.85
  4. Step 4: Simplify right side
    610.07x = 402,689.49
  5. Step 5: Solve for x
    x = 402,689.49/610.07
  6. Step 6: Final answer
    x = 660.08

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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.