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Finding the Fourth Proportional to 624,615.54, 861,969.30 and 338,135.40

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Solution

The fourth proportional to 624,615.54, 861,969.30 and 338,135.40 is: 466,626.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    624,615.54 : 861,969.30 = 338,135.40 : x
  2. Step 2: Convert to fraction form
    624,615.54/861,969.30 = 338,135.40/x
  3. Step 3: Cross multiply
    624,615.54x = 861,969.30 × 338,135.40
  4. Step 4: Simplify right side
    624,615.54x = 291,462,334,043.22
  5. Step 5: Solve for x
    x = 291,462,334,043.22/624,615.54
  6. Step 6: Final answer
    x = 466,626.77

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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.