Home / 1,298.09-1,947.27-432.47

Finding the Fourth Proportional to 1,298.09, 1,947.27 and 432.47

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Solution

The fourth proportional to 1,298.09, 1,947.27 and 432.47 is: 648.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,298.09 : 1,947.27 = 432.47 : x
  2. Step 2: Convert to fraction form
    1,298.09/1,947.27 = 432.47/x
  3. Step 3: Cross multiply
    1,298.09x = 1,947.27 × 432.47
  4. Step 4: Simplify right side
    1,298.09x = 842,135.86
  5. Step 5: Solve for x
    x = 842,135.86/1,298.09
  6. Step 6: Final answer
    x = 648.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.