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Finding the Fourth Proportional to 393,289.63, 542,781.32 and 240,417.29

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Solution

The fourth proportional to 393,289.63, 542,781.32 and 240,417.29 is: 331,801.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,289.63 : 542,781.32 = 240,417.29 : x
  2. Step 2: Convert to fraction form
    393,289.63/542,781.32 = 240,417.29/x
  3. Step 3: Cross multiply
    393,289.63x = 542,781.32 × 240,417.29
  4. Step 4: Simplify right side
    393,289.63x = 130,494,014,171.89
  5. Step 5: Solve for x
    x = 130,494,014,171.89/393,289.63
  6. Step 6: Final answer
    x = 331,801.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.