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Finding the Fourth Proportional to 838.04, 1,156.56 and 488.78

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Solution

The fourth proportional to 838.04, 1,156.56 and 488.78 is: 674.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    838.04 : 1,156.56 = 488.78 : x
  2. Step 2: Convert to fraction form
    838.04/1,156.56 = 488.78/x
  3. Step 3: Cross multiply
    838.04x = 1,156.56 × 488.78
  4. Step 4: Simplify right side
    838.04x = 565,303.40
  5. Step 5: Solve for x
    x = 565,303.40/838.04
  6. Step 6: Final answer
    x = 674.55

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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.