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Finding the Fourth Proportional to 612,212.70, 918,316.05 and 156,803.06

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Solution

The fourth proportional to 612,212.70, 918,316.05 and 156,803.06 is: 235,203.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,212.70 : 918,316.05 = 156,803.06 : x
  2. Step 2: Convert to fraction form
    612,212.70/918,316.05 = 156,803.06/x
  3. Step 3: Cross multiply
    612,212.70x = 918,316.05 × 156,803.06
  4. Step 4: Simplify right side
    612,212.70x = 143,994,766,687.11
  5. Step 5: Solve for x
    x = 143,994,766,687.11/612,212.70
  6. Step 6: Final answer
    x = 235,203.82

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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.