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Finding the Fourth Proportional to 1,258.89, 1,888.74 and 437.55

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Solution

The fourth proportional to 1,258.89, 1,888.74 and 437.55 is: 656.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,258.89 : 1,888.74 = 437.55 : x
  2. Step 2: Convert to fraction form
    1,258.89/1,888.74 = 437.55/x
  3. Step 3: Cross multiply
    1,258.89x = 1,888.74 × 437.55
  4. Step 4: Simplify right side
    1,258.89x = 826,418.19
  5. Step 5: Solve for x
    x = 826,418.19/1,258.89
  6. Step 6: Final answer
    x = 656.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.