Home / 1,298.94-1,948.32-421.42

Finding the Fourth Proportional to 1,298.94, 1,948.32 and 421.42

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Solution

The fourth proportional to 1,298.94, 1,948.32 and 421.42 is: 632.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,298.94 : 1,948.32 = 421.42 : x
  2. Step 2: Convert to fraction form
    1,298.94/1,948.32 = 421.42/x
  3. Step 3: Cross multiply
    1,298.94x = 1,948.32 × 421.42
  4. Step 4: Simplify right side
    1,298.94x = 821,061.01
  5. Step 5: Solve for x
    x = 821,061.01/1,298.94
  6. Step 6: Final answer
    x = 632.10

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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.