Home / 1,531.04-2,112.30-971.36

Finding the Fourth Proportional to 1,531.04, 2,112.30 and 971.36

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Solution

The fourth proportional to 1,531.04, 2,112.30 and 971.36 is: 1,340.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,531.04 : 2,112.30 = 971.36 : x
  2. Step 2: Convert to fraction form
    1,531.04/2,112.30 = 971.36/x
  3. Step 3: Cross multiply
    1,531.04x = 2,112.30 × 971.36
  4. Step 4: Simplify right side
    1,531.04x = 2,051,803.73
  5. Step 5: Solve for x
    x = 2,051,803.73/1,531.04
  6. Step 6: Final answer
    x = 1,340.14

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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.