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Finding the Fourth Proportional to 977.91, 1,349.55 and 535.83

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Solution

The fourth proportional to 977.91, 1,349.55 and 535.83 is: 739.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    977.91 : 1,349.55 = 535.83 : x
  2. Step 2: Convert to fraction form
    977.91/1,349.55 = 535.83/x
  3. Step 3: Cross multiply
    977.91x = 1,349.55 × 535.83
  4. Step 4: Simplify right side
    977.91x = 723,129.38
  5. Step 5: Solve for x
    x = 723,129.38/977.91
  6. Step 6: Final answer
    x = 739.46

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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.