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Finding the Fourth Proportional to 614.19, 848.67 and 490.87

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Solution

The fourth proportional to 614.19, 848.67 and 490.87 is: 678.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    614.19 : 848.67 = 490.87 : x
  2. Step 2: Convert to fraction form
    614.19/848.67 = 490.87/x
  3. Step 3: Cross multiply
    614.19x = 848.67 × 490.87
  4. Step 4: Simplify right side
    614.19x = 416,585.86
  5. Step 5: Solve for x
    x = 416,585.86/614.19
  6. Step 6: Final answer
    x = 678.26

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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.