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Finding the Fourth Proportional to 1,531.90, 2,114.10 and 902.32

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Solution

The fourth proportional to 1,531.90, 2,114.10 and 902.32 is: 1,245.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,531.90 : 2,114.10 = 902.32 : x
  2. Step 2: Convert to fraction form
    1,531.90/2,114.10 = 902.32/x
  3. Step 3: Cross multiply
    1,531.90x = 2,114.10 × 902.32
  4. Step 4: Simplify right side
    1,531.90x = 1,907,594.71
  5. Step 5: Solve for x
    x = 1,907,594.71/1,531.90
  6. Step 6: Final answer
    x = 1,245.25

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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.