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Finding the Fourth Proportional to 1,875.78, 2,588.34 and 1,089.66

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Solution

The fourth proportional to 1,875.78, 2,588.34 and 1,089.66 is: 1,503.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,875.78 : 2,588.34 = 1,089.66 : x
  2. Step 2: Convert to fraction form
    1,875.78/2,588.34 = 1,089.66/x
  3. Step 3: Cross multiply
    1,875.78x = 2,588.34 × 1,089.66
  4. Step 4: Simplify right side
    1,875.78x = 2,820,410.56
  5. Step 5: Solve for x
    x = 2,820,410.56/1,875.78
  6. Step 6: Final answer
    x = 1,503.59

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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.