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Finding the Fourth Proportional to 615.79, 919.76 and 529.33

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Solution

The fourth proportional to 615.79, 919.76 and 529.33 is: 790.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    615.79 : 919.76 = 529.33 : x
  2. Step 2: Convert to fraction form
    615.79/919.76 = 529.33/x
  3. Step 3: Cross multiply
    615.79x = 919.76 × 529.33
  4. Step 4: Simplify right side
    615.79x = 486,851.96
  5. Step 5: Solve for x
    x = 486,851.96/615.79
  6. Step 6: Final answer
    x = 790.61

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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.