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Finding the Fourth Proportional to 1,530.90, 2,113.19 and 901.53

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Solution

The fourth proportional to 1,530.90, 2,113.19 and 901.53 is: 1,244.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,530.90 : 2,113.19 = 901.53 : x
  2. Step 2: Convert to fraction form
    1,530.90/2,113.19 = 901.53/x
  3. Step 3: Cross multiply
    1,530.90x = 2,113.19 × 901.53
  4. Step 4: Simplify right side
    1,530.90x = 1,905,103.05
  5. Step 5: Solve for x
    x = 1,905,103.05/1,530.90
  6. Step 6: Final answer
    x = 1,244.43

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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.