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Finding the Fourth Proportional to 977.95, 1,467.11 and 430.13

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Solution

The fourth proportional to 977.95, 1,467.11 and 430.13 is: 645.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    977.95 : 1,467.11 = 430.13 : x
  2. Step 2: Convert to fraction form
    977.95/1,467.11 = 430.13/x
  3. Step 3: Cross multiply
    977.95x = 1,467.11 × 430.13
  4. Step 4: Simplify right side
    977.95x = 631,046.06
  5. Step 5: Solve for x
    x = 631,046.06/977.95
  6. Step 6: Final answer
    x = 645.28

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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.