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Finding the Fourth Proportional to 612,321.78, 918,499.95 and 169,089.78

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Solution

The fourth proportional to 612,321.78, 918,499.95 and 169,089.78 is: 253,639.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,321.78 : 918,499.95 = 169,089.78 : x
  2. Step 2: Convert to fraction form
    612,321.78/918,499.95 = 169,089.78/x
  3. Step 3: Cross multiply
    612,321.78x = 918,499.95 × 169,089.78
  4. Step 4: Simplify right side
    612,321.78x = 155,308,954,475.51
  5. Step 5: Solve for x
    x = 155,308,954,475.51/612,321.78
  6. Step 6: Final answer
    x = 253,639.44

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1.5x scale

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.