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Finding the Fourth Proportional to 404,289.60, 606,434.40 and 138,026.40

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Solution

The fourth proportional to 404,289.60, 606,434.40 and 138,026.40 is: 207,039.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    404,289.60 : 606,434.40 = 138,026.40 : x
  2. Step 2: Convert to fraction form
    404,289.60/606,434.40 = 138,026.40/x
  3. Step 3: Cross multiply
    404,289.60x = 606,434.40 × 138,026.40
  4. Step 4: Simplify right side
    404,289.60x = 83,703,957,068.16
  5. Step 5: Solve for x
    x = 83,703,957,068.16/404,289.60
  6. Step 6: Final answer
    x = 207,039.60

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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.