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Finding the Fourth Proportional to 971.09, 1,463.61 and 918.30

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Solution

The fourth proportional to 971.09, 1,463.61 and 918.30 is: 1,384.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    971.09 : 1,463.61 = 918.30 : x
  2. Step 2: Convert to fraction form
    971.09/1,463.61 = 918.30/x
  3. Step 3: Cross multiply
    971.09x = 1,463.61 × 918.30
  4. Step 4: Simplify right side
    971.09x = 1,344,033.06
  5. Step 5: Solve for x
    x = 1,344,033.06/971.09
  6. Step 6: Final answer
    x = 1,384.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.