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Finding the Fourth Proportional to 836.04, 1,153.80 and 486.76

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Solution

The fourth proportional to 836.04, 1,153.80 and 486.76 is: 671.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    836.04 : 1,153.80 = 486.76 : x
  2. Step 2: Convert to fraction form
    836.04/1,153.80 = 486.76/x
  3. Step 3: Cross multiply
    836.04x = 1,153.80 × 486.76
  4. Step 4: Simplify right side
    836.04x = 561,623.69
  5. Step 5: Solve for x
    x = 561,623.69/836.04
  6. Step 6: Final answer
    x = 671.77

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Half scale
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Double scale
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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.