Home / 1,254.16-1,880.60-420.93

Finding the Fourth Proportional to 1,254.16, 1,880.60 and 420.93

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Solution

The fourth proportional to 1,254.16, 1,880.60 and 420.93 is: 631.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,254.16 : 1,880.60 = 420.93 : x
  2. Step 2: Convert to fraction form
    1,254.16/1,880.60 = 420.93/x
  3. Step 3: Cross multiply
    1,254.16x = 1,880.60 × 420.93
  4. Step 4: Simplify right side
    1,254.16x = 791,600.96
  5. Step 5: Solve for x
    x = 791,600.96/1,254.16
  6. Step 6: Final answer
    x = 631.18

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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.