Home / 1,681.02-2,319.69-972.87

Finding the Fourth Proportional to 1,681.02, 2,319.69 and 972.87

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Solution

The fourth proportional to 1,681.02, 2,319.69 and 972.87 is: 1,342.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,681.02 : 2,319.69 = 972.87 : x
  2. Step 2: Convert to fraction form
    1,681.02/2,319.69 = 972.87/x
  3. Step 3: Cross multiply
    1,681.02x = 2,319.69 × 972.87
  4. Step 4: Simplify right side
    1,681.02x = 2,256,753.16
  5. Step 5: Solve for x
    x = 2,256,753.16/1,681.02
  6. Step 6: Final answer
    x = 1,342.49

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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.