Home / 990,049.65-1,485,061.90-316,122.40

Finding the Fourth Proportional to 990,049.65, 1,485,061.90 and 316,122.40

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Solution

The fourth proportional to 990,049.65, 1,485,061.90 and 316,122.40 is: 474,179.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,049.65 : 1,485,061.90 = 316,122.40 : x
  2. Step 2: Convert to fraction form
    990,049.65/1,485,061.90 = 316,122.40/x
  3. Step 3: Cross multiply
    990,049.65x = 1,485,061.90 × 316,122.40
  4. Step 4: Simplify right side
    990,049.65x = 469,461,331,976.56
  5. Step 5: Solve for x
    x = 469,461,331,976.56/990,049.65
  6. Step 6: Final answer
    x = 474,179.58

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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.