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Finding the Fourth Proportional to 1,315.51, 1,973.13 and 881.76

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Solution

The fourth proportional to 1,315.51, 1,973.13 and 881.76 is: 1,322.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315.51 : 1,973.13 = 881.76 : x
  2. Step 2: Convert to fraction form
    1,315.51/1,973.13 = 881.76/x
  3. Step 3: Cross multiply
    1,315.51x = 1,973.13 × 881.76
  4. Step 4: Simplify right side
    1,315.51x = 1,739,827.11
  5. Step 5: Solve for x
    x = 1,739,827.11/1,315.51
  6. Step 6: Final answer
    x = 1,322.55

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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.