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Finding the Fourth Proportional to 977.46, 1,465.50 and 490.16

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Solution

The fourth proportional to 977.46, 1,465.50 and 490.16 is: 734.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    977.46 : 1,465.50 = 490.16 : x
  2. Step 2: Convert to fraction form
    977.46/1,465.50 = 490.16/x
  3. Step 3: Cross multiply
    977.46x = 1,465.50 × 490.16
  4. Step 4: Simplify right side
    977.46x = 718,329.48
  5. Step 5: Solve for x
    x = 718,329.48/977.46
  6. Step 6: Final answer
    x = 734.89

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.