Home / 990,417.28-1,485,609-316,493.68

Finding the Fourth Proportional to 990,417.28, 1,485,609 and 316,493.68

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Solution

The fourth proportional to 990,417.28, 1,485,609 and 316,493.68 is: 474,735.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,417.28 : 1,485,609 = 316,493.68 : x
  2. Step 2: Convert to fraction form
    990,417.28/1,485,609 = 316,493.68/x
  3. Step 3: Cross multiply
    990,417.28x = 1,485,609 × 316,493.68
  4. Step 4: Simplify right side
    990,417.28x = 470,185,859,451.12
  5. Step 5: Solve for x
    x = 470,185,859,451.12/990,417.28
  6. Step 6: Final answer
    x = 474,735.11

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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.