Home / 1,698.19-2,547.42-724.30

Finding the Fourth Proportional to 1,698.19, 2,547.42 and 724.30

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Solution

The fourth proportional to 1,698.19, 2,547.42 and 724.30 is: 1,086.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,698.19 : 2,547.42 = 724.30 : x
  2. Step 2: Convert to fraction form
    1,698.19/2,547.42 = 724.30/x
  3. Step 3: Cross multiply
    1,698.19x = 2,547.42 × 724.30
  4. Step 4: Simplify right side
    1,698.19x = 1,845,079.95
  5. Step 5: Solve for x
    x = 1,845,079.95/1,698.19
  6. Step 6: Final answer
    x = 1,086.50

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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.