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Finding the Fourth Proportional to 495,959.80, 741,971.40 and 430,131.10

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Solution

The fourth proportional to 495,959.80, 741,971.40 and 430,131.10 is: 643,489.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    495,959.80 : 741,971.40 = 430,131.10 : x
  2. Step 2: Convert to fraction form
    495,959.80/741,971.40 = 430,131.10/x
  3. Step 3: Cross multiply
    495,959.80x = 741,971.40 × 430,131.10
  4. Step 4: Simplify right side
    495,959.80x = 319,144,974,450.54
  5. Step 5: Solve for x
    x = 319,144,974,450.54/495,959.80
  6. Step 6: Final answer
    x = 643,489.60

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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.