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Finding the Fourth Proportional to 1,315.60, 1,973.76 and 449.92

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Solution

The fourth proportional to 1,315.60, 1,973.76 and 449.92 is: 675.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315.60 : 1,973.76 = 449.92 : x
  2. Step 2: Convert to fraction form
    1,315.60/1,973.76 = 449.92/x
  3. Step 3: Cross multiply
    1,315.60x = 1,973.76 × 449.92
  4. Step 4: Simplify right side
    1,315.60x = 888,034.10
  5. Step 5: Solve for x
    x = 888,034.10/1,315.60
  6. Step 6: Final answer
    x = 675.00

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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.