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Finding the Fourth Proportional to 420,988.88, 580,969.80 and 230,004.56

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Solution

The fourth proportional to 420,988.88, 580,969.80 and 230,004.56 is: 317,409.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,988.88 : 580,969.80 = 230,004.56 : x
  2. Step 2: Convert to fraction form
    420,988.88/580,969.80 = 230,004.56/x
  3. Step 3: Cross multiply
    420,988.88x = 580,969.80 × 230,004.56
  4. Step 4: Simplify right side
    420,988.88x = 133,625,703,222.29
  5. Step 5: Solve for x
    x = 133,625,703,222.29/420,988.88
  6. Step 6: Final answer
    x = 317,409.10

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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.