Home / 840.03-1,260.24-429.18

Finding the Fourth Proportional to 840.03, 1,260.24 and 429.18

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Solution

The fourth proportional to 840.03, 1,260.24 and 429.18 is: 643.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    840.03 : 1,260.24 = 429.18 : x
  2. Step 2: Convert to fraction form
    840.03/1,260.24 = 429.18/x
  3. Step 3: Cross multiply
    840.03x = 1,260.24 × 429.18
  4. Step 4: Simplify right side
    840.03x = 540,869.80
  5. Step 5: Solve for x
    x = 540,869.80/840.03
  6. Step 6: Final answer
    x = 643.87

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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.