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Finding the Fourth Proportional to 348.51, 522.70 and 117.40

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Solution

The fourth proportional to 348.51, 522.70 and 117.40 is: 176.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    348.51 : 522.70 = 117.40 : x
  2. Step 2: Convert to fraction form
    348.51/522.70 = 117.40/x
  3. Step 3: Cross multiply
    348.51x = 522.70 × 117.40
  4. Step 4: Simplify right side
    348.51x = 61,364.98
  5. Step 5: Solve for x
    x = 61,364.98/348.51
  6. Step 6: Final answer
    x = 176.08

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.