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Finding the Fourth Proportional to 833.79, 1,152.18 and 638.67

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Solution

The fourth proportional to 833.79, 1,152.18 and 638.67 is: 882.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    833.79 : 1,152.18 = 638.67 : x
  2. Step 2: Convert to fraction form
    833.79/1,152.18 = 638.67/x
  3. Step 3: Cross multiply
    833.79x = 1,152.18 × 638.67
  4. Step 4: Simplify right side
    833.79x = 735,862.80
  5. Step 5: Solve for x
    x = 735,862.80/833.79
  6. Step 6: Final answer
    x = 882.55

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1.5x scale

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.