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Finding the Fourth Proportional to 1,132.40, 1,698.56 and 448.40

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Solution

The fourth proportional to 1,132.40, 1,698.56 and 448.40 is: 672.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,132.40 : 1,698.56 = 448.40 : x
  2. Step 2: Convert to fraction form
    1,132.40/1,698.56 = 448.40/x
  3. Step 3: Cross multiply
    1,132.40x = 1,698.56 × 448.40
  4. Step 4: Simplify right side
    1,132.40x = 761,634.30
  5. Step 5: Solve for x
    x = 761,634.30/1,132.40
  6. Step 6: Final answer
    x = 672.58

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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.