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Finding the Fourth Proportional to 640,167.36, 960,204.96 and 280,374.72

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Solution

The fourth proportional to 640,167.36, 960,204.96 and 280,374.72 is: 420,541.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,167.36 : 960,204.96 = 280,374.72 : x
  2. Step 2: Convert to fraction form
    640,167.36/960,204.96 = 280,374.72/x
  3. Step 3: Cross multiply
    640,167.36x = 960,204.96 × 280,374.72
  4. Step 4: Simplify right side
    640,167.36x = 269,217,196,802.61
  5. Step 5: Solve for x
    x = 269,217,196,802.61/640,167.36
  6. Step 6: Final answer
    x = 420,541.90

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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.