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Finding the Fourth Proportional to 326,415.79, 489,567.33 and 86,531.29

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Solution

The fourth proportional to 326,415.79, 489,567.33 and 86,531.29 is: 129,782.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    326,415.79 : 489,567.33 = 86,531.29 : x
  2. Step 2: Convert to fraction form
    326,415.79/489,567.33 = 86,531.29/x
  3. Step 3: Cross multiply
    326,415.79x = 489,567.33 × 86,531.29
  4. Step 4: Simplify right side
    326,415.79x = 42,362,892,606.76
  5. Step 5: Solve for x
    x = 42,362,892,606.76/326,415.79
  6. Step 6: Final answer
    x = 129,782.00

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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.