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Finding the Fourth Proportional to 528,007.40, 791,816.70 and 261,679.40

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Solution

The fourth proportional to 528,007.40, 791,816.70 and 261,679.40 is: 392,422.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,007.40 : 791,816.70 = 261,679.40 : x
  2. Step 2: Convert to fraction form
    528,007.40/791,816.70 = 261,679.40/x
  3. Step 3: Cross multiply
    528,007.40x = 791,816.70 × 261,679.40
  4. Step 4: Simplify right side
    528,007.40x = 207,202,118,965.98
  5. Step 5: Solve for x
    x = 207,202,118,965.98/528,007.40
  6. Step 6: Final answer
    x = 392,422.76

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1.5x scale

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.