Home / 1,681.47-2,316.65-1,261.17

Finding the Fourth Proportional to 1,681.47, 2,316.65 and 1,261.17

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Solution

The fourth proportional to 1,681.47, 2,316.65 and 1,261.17 is: 1,737.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,681.47 : 2,316.65 = 1,261.17 : x
  2. Step 2: Convert to fraction form
    1,681.47/2,316.65 = 1,261.17/x
  3. Step 3: Cross multiply
    1,681.47x = 2,316.65 × 1,261.17
  4. Step 4: Simplify right side
    1,681.47x = 2,921,683.17
  5. Step 5: Solve for x
    x = 2,921,683.17/1,681.47
  6. Step 6: Final answer
    x = 1,737.58

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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.