Home / 1,587.61-2,188.43-1,292.36

Finding the Fourth Proportional to 1,587.61, 2,188.43 and 1,292.36

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Solution

The fourth proportional to 1,587.61, 2,188.43 and 1,292.36 is: 1,781.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,587.61 : 2,188.43 = 1,292.36 : x
  2. Step 2: Convert to fraction form
    1,587.61/2,188.43 = 1,292.36/x
  3. Step 3: Cross multiply
    1,587.61x = 2,188.43 × 1,292.36
  4. Step 4: Simplify right side
    1,587.61x = 2,828,239.39
  5. Step 5: Solve for x
    x = 2,828,239.39/1,587.61
  6. Step 6: Final answer
    x = 1,781.45

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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.