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Finding the Fourth Proportional to 528,038.80, 791,539.80 and 261,840.40

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Solution

The fourth proportional to 528,038.80, 791,539.80 and 261,840.40 is: 392,503.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,038.80 : 791,539.80 = 261,840.40 : x
  2. Step 2: Convert to fraction form
    528,038.80/791,539.80 = 261,840.40/x
  3. Step 3: Cross multiply
    528,038.80x = 791,539.80 × 261,840.40
  4. Step 4: Simplify right side
    528,038.80x = 207,257,097,847.92
  5. Step 5: Solve for x
    x = 207,257,097,847.92/528,038.80
  6. Step 6: Final answer
    x = 392,503.54

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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.