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Finding the Fourth Proportional to 837.89, 1,156.12 and 478.94

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Solution

The fourth proportional to 837.89, 1,156.12 and 478.94 is: 660.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    837.89 : 1,156.12 = 478.94 : x
  2. Step 2: Convert to fraction form
    837.89/1,156.12 = 478.94/x
  3. Step 3: Cross multiply
    837.89x = 1,156.12 × 478.94
  4. Step 4: Simplify right side
    837.89x = 553,712.11
  5. Step 5: Solve for x
    x = 553,712.11/837.89
  6. Step 6: Final answer
    x = 660.84

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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.