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Finding the Fourth Proportional to 738.79, 1,108.55 and 348.77

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Solution

The fourth proportional to 738.79, 1,108.55 and 348.77 is: 523.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    738.79 : 1,108.55 = 348.77 : x
  2. Step 2: Convert to fraction form
    738.79/1,108.55 = 348.77/x
  3. Step 3: Cross multiply
    738.79x = 1,108.55 × 348.77
  4. Step 4: Simplify right side
    738.79x = 386,630.01
  5. Step 5: Solve for x
    x = 386,630.01/738.79
  6. Step 6: Final answer
    x = 523.33

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1.5x scale

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.