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Finding the Fourth Proportional to 247,281.40, 370,835.70 and 128,913.40

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Solution

The fourth proportional to 247,281.40, 370,835.70 and 128,913.40 is: 193,325.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,281.40 : 370,835.70 = 128,913.40 : x
  2. Step 2: Convert to fraction form
    247,281.40/370,835.70 = 128,913.40/x
  3. Step 3: Cross multiply
    247,281.40x = 370,835.70 × 128,913.40
  4. Step 4: Simplify right side
    247,281.40x = 47,805,690,928.38
  5. Step 5: Solve for x
    x = 47,805,690,928.38/247,281.40
  6. Step 6: Final answer
    x = 193,325.06

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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.