Home / 1,298.87-1,947.58-432.71

Finding the Fourth Proportional to 1,298.87, 1,947.58 and 432.71

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Solution

The fourth proportional to 1,298.87, 1,947.58 and 432.71 is: 648.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,298.87 : 1,947.58 = 432.71 : x
  2. Step 2: Convert to fraction form
    1,298.87/1,947.58 = 432.71/x
  3. Step 3: Cross multiply
    1,298.87x = 1,947.58 × 432.71
  4. Step 4: Simplify right side
    1,298.87x = 842,737.34
  5. Step 5: Solve for x
    x = 842,737.34/1,298.87
  6. Step 6: Final answer
    x = 648.82

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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.