Home / 1,681.05-2,319.80-972.88

Finding the Fourth Proportional to 1,681.05, 2,319.80 and 972.88

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Solution

The fourth proportional to 1,681.05, 2,319.80 and 972.88 is: 1,342.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,681.05 : 2,319.80 = 972.88 : x
  2. Step 2: Convert to fraction form
    1,681.05/2,319.80 = 972.88/x
  3. Step 3: Cross multiply
    1,681.05x = 2,319.80 × 972.88
  4. Step 4: Simplify right side
    1,681.05x = 2,256,887.02
  5. Step 5: Solve for x
    x = 2,256,887.02/1,681.05
  6. Step 6: Final answer
    x = 1,342.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.