Home / 1,531.40-2,115.05-1,036.08

Finding the Fourth Proportional to 1,531.40, 2,115.05 and 1,036.08

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Solution

The fourth proportional to 1,531.40, 2,115.05 and 1,036.08 is: 1,430.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,531.40 : 2,115.05 = 1,036.08 : x
  2. Step 2: Convert to fraction form
    1,531.40/2,115.05 = 1,036.08/x
  3. Step 3: Cross multiply
    1,531.40x = 2,115.05 × 1,036.08
  4. Step 4: Simplify right side
    1,531.40x = 2,191,355.82
  5. Step 5: Solve for x
    x = 2,191,355.82/1,531.40
  6. Step 6: Final answer
    x = 1,430.95

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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.