Home / 1,681.50-2,320.56-983.28

Finding the Fourth Proportional to 1,681.50, 2,320.56 and 983.28

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Solution

The fourth proportional to 1,681.50, 2,320.56 and 983.28 is: 1,356.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,681.50 : 2,320.56 = 983.28 : x
  2. Step 2: Convert to fraction form
    1,681.50/2,320.56 = 983.28/x
  3. Step 3: Cross multiply
    1,681.50x = 2,320.56 × 983.28
  4. Step 4: Simplify right side
    1,681.50x = 2,281,760.24
  5. Step 5: Solve for x
    x = 2,281,760.24/1,681.50
  6. Step 6: Final answer
    x = 1,356.98

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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.