Home / 990,419.28-1,485,612-316,495.68

Finding the Fourth Proportional to 990,419.28, 1,485,612 and 316,495.68

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Solution

The fourth proportional to 990,419.28, 1,485,612 and 316,495.68 is: 474,738.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,419.28 : 1,485,612 = 316,495.68 : x
  2. Step 2: Convert to fraction form
    990,419.28/1,485,612 = 316,495.68/x
  3. Step 3: Cross multiply
    990,419.28x = 1,485,612 × 316,495.68
  4. Step 4: Simplify right side
    990,419.28x = 470,189,780,156.16
  5. Step 5: Solve for x
    x = 470,189,780,156.16/990,419.28
  6. Step 6: Final answer
    x = 474,738.11

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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.