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Finding the Fourth Proportional to 1,122.40, 1,547.94 and 901.27

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Solution

The fourth proportional to 1,122.40, 1,547.94 and 901.27 is: 1,242.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,122.40 : 1,547.94 = 901.27 : x
  2. Step 2: Convert to fraction form
    1,122.40/1,547.94 = 901.27/x
  3. Step 3: Cross multiply
    1,122.40x = 1,547.94 × 901.27
  4. Step 4: Simplify right side
    1,122.40x = 1,395,111.88
  5. Step 5: Solve for x
    x = 1,395,111.88/1,122.40
  6. Step 6: Final answer
    x = 1,242.97

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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.