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Finding the Fourth Proportional to 421,889.31, 632,765.93 and 155,775.15

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Solution

The fourth proportional to 421,889.31, 632,765.93 and 155,775.15 is: 233,637.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,889.31 : 632,765.93 = 155,775.15 : x
  2. Step 2: Convert to fraction form
    421,889.31/632,765.93 = 155,775.15/x
  3. Step 3: Cross multiply
    421,889.31x = 632,765.93 × 155,775.15
  4. Step 4: Simplify right side
    421,889.31x = 98,569,206,881.76
  5. Step 5: Solve for x
    x = 98,569,206,881.76/421,889.31
  6. Step 6: Final answer
    x = 233,637.60

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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.