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Finding the Fourth Proportional to 841.35, 1,260.27 and 429.24

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Solution

The fourth proportional to 841.35, 1,260.27 and 429.24 is: 642.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    841.35 : 1,260.27 = 429.24 : x
  2. Step 2: Convert to fraction form
    841.35/1,260.27 = 429.24/x
  3. Step 3: Cross multiply
    841.35x = 1,260.27 × 429.24
  4. Step 4: Simplify right side
    841.35x = 540,958.29
  5. Step 5: Solve for x
    x = 540,958.29/841.35
  6. Step 6: Final answer
    x = 642.96

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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.