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Finding the Fourth Proportional to 355,636.80, 532,807.20 and 281,246.40

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Solution

The fourth proportional to 355,636.80, 532,807.20 and 281,246.40 is: 421,357.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,636.80 : 532,807.20 = 281,246.40 : x
  2. Step 2: Convert to fraction form
    355,636.80/532,807.20 = 281,246.40/x
  3. Step 3: Cross multiply
    355,636.80x = 532,807.20 × 281,246.40
  4. Step 4: Simplify right side
    355,636.80x = 149,850,106,894.08
  5. Step 5: Solve for x
    x = 149,850,106,894.08/355,636.80
  6. Step 6: Final answer
    x = 421,357.15

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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.