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Finding the Fourth Proportional to 340,510.79, 469,679.89 and 212,964.95

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Solution

The fourth proportional to 340,510.79, 469,679.89 and 212,964.95 is: 293,750.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    340,510.79 : 469,679.89 = 212,964.95 : x
  2. Step 2: Convert to fraction form
    340,510.79/469,679.89 = 212,964.95/x
  3. Step 3: Cross multiply
    340,510.79x = 469,679.89 × 212,964.95
  4. Step 4: Simplify right side
    340,510.79x = 100,025,354,289.86
  5. Step 5: Solve for x
    x = 100,025,354,289.86/340,510.79
  6. Step 6: Final answer
    x = 293,750.91

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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.