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Finding the Fourth Proportional to 342.60, 510.93 and 291.57

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Solution

The fourth proportional to 342.60, 510.93 and 291.57 is: 434.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    342.60 : 510.93 = 291.57 : x
  2. Step 2: Convert to fraction form
    342.60/510.93 = 291.57/x
  3. Step 3: Cross multiply
    342.60x = 510.93 × 291.57
  4. Step 4: Simplify right side
    342.60x = 148,971.86
  5. Step 5: Solve for x
    x = 148,971.86/342.60
  6. Step 6: Final answer
    x = 434.83

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.