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Finding the Fourth Proportional to 638,854.70, 958,282.05 and 479,422.40

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Solution

The fourth proportional to 638,854.70, 958,282.05 and 479,422.40 is: 719,133.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,854.70 : 958,282.05 = 479,422.40 : x
  2. Step 2: Convert to fraction form
    638,854.70/958,282.05 = 479,422.40/x
  3. Step 3: Cross multiply
    638,854.70x = 958,282.05 × 479,422.40
  4. Step 4: Simplify right side
    638,854.70x = 459,421,880,287.92
  5. Step 5: Solve for x
    x = 459,421,880,287.92/638,854.70
  6. Step 6: Final answer
    x = 719,133.60

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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.