Home / 209,985.12-315,125.28-189,908.46

Finding the Fourth Proportional to 209,985.12, 315,125.28 and 189,908.46

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Solution

The fourth proportional to 209,985.12, 315,125.28 and 189,908.46 is: 284,996.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,985.12 : 315,125.28 = 189,908.46 : x
  2. Step 2: Convert to fraction form
    209,985.12/315,125.28 = 189,908.46/x
  3. Step 3: Cross multiply
    209,985.12x = 315,125.28 × 189,908.46
  4. Step 4: Simplify right side
    209,985.12x = 59,844,956,631.87
  5. Step 5: Solve for x
    x = 59,844,956,631.87/209,985.12
  6. Step 6: Final answer
    x = 284,996.18

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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.