Home / 1,587.49-2,185.45-1,365.55

Finding the Fourth Proportional to 1,587.49, 2,185.45 and 1,365.55

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Solution

The fourth proportional to 1,587.49, 2,185.45 and 1,365.55 is: 1,879.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,587.49 : 2,185.45 = 1,365.55 : x
  2. Step 2: Convert to fraction form
    1,587.49/2,185.45 = 1,365.55/x
  3. Step 3: Cross multiply
    1,587.49x = 2,185.45 × 1,365.55
  4. Step 4: Simplify right side
    1,587.49x = 2,984,341.25
  5. Step 5: Solve for x
    x = 2,984,341.25/1,587.49
  6. Step 6: Final answer
    x = 1,879.91

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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.