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Finding the Fourth Proportional to 554.83, 765.59 and 318.76

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Solution

The fourth proportional to 554.83, 765.59 and 318.76 is: 439.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    554.83 : 765.59 = 318.76 : x
  2. Step 2: Convert to fraction form
    554.83/765.59 = 318.76/x
  3. Step 3: Cross multiply
    554.83x = 765.59 × 318.76
  4. Step 4: Simplify right side
    554.83x = 244,039.47
  5. Step 5: Solve for x
    x = 244,039.47/554.83
  6. Step 6: Final answer
    x = 439.85

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Find fourth proportional to 277.42, 382.80 and 159.38
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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.