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Finding the Fourth Proportional to 352,612.40, 528,967.20 and 127,918.40

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Solution

The fourth proportional to 352,612.40, 528,967.20 and 127,918.40 is: 191,895.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    352,612.40 : 528,967.20 = 127,918.40 : x
  2. Step 2: Convert to fraction form
    352,612.40/528,967.20 = 127,918.40/x
  3. Step 3: Cross multiply
    352,612.40x = 528,967.20 × 127,918.40
  4. Step 4: Simplify right side
    352,612.40x = 67,664,637,876.48
  5. Step 5: Solve for x
    x = 67,664,637,876.48/352,612.40
  6. Step 6: Final answer
    x = 191,895.23

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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.