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Finding the Fourth Proportional to 977.48, 1,349.40 and 604.76

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Solution

The fourth proportional to 977.48, 1,349.40 and 604.76 is: 834.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    977.48 : 1,349.40 = 604.76 : x
  2. Step 2: Convert to fraction form
    977.48/1,349.40 = 604.76/x
  3. Step 3: Cross multiply
    977.48x = 1,349.40 × 604.76
  4. Step 4: Simplify right side
    977.48x = 816,063.14
  5. Step 5: Solve for x
    x = 816,063.14/977.48
  6. Step 6: Final answer
    x = 834.86

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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.