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Finding the Fourth Proportional to 528,589.20, 791,263.80 and 291,205.20

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Solution

The fourth proportional to 528,589.20, 791,263.80 and 291,205.20 is: 435,915.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,589.20 : 791,263.80 = 291,205.20 : x
  2. Step 2: Convert to fraction form
    528,589.20/791,263.80 = 291,205.20/x
  3. Step 3: Cross multiply
    528,589.20x = 791,263.80 × 291,205.20
  4. Step 4: Simplify right side
    528,589.20x = 230,420,133,131.76
  5. Step 5: Solve for x
    x = 230,420,133,131.76/528,589.20
  6. Step 6: Final answer
    x = 435,915.33

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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.