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Finding the Fourth Proportional to 355,020.80, 532,378.80 and 130,307.36

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Solution

The fourth proportional to 355,020.80, 532,378.80 and 130,307.36 is: 195,405.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,020.80 : 532,378.80 = 130,307.36 : x
  2. Step 2: Convert to fraction form
    355,020.80/532,378.80 = 130,307.36/x
  3. Step 3: Cross multiply
    355,020.80x = 532,378.80 × 130,307.36
  4. Step 4: Simplify right side
    355,020.80x = 69,372,875,947.97
  5. Step 5: Solve for x
    x = 69,372,875,947.97/355,020.80
  6. Step 6: Final answer
    x = 195,405.10

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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.