Home / 718,371-1,077,561.90-318,904.38

Finding the Fourth Proportional to 718,371, 1,077,561.90 and 318,904.38

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Solution

The fourth proportional to 718,371, 1,077,561.90 and 318,904.38 is: 478,358.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,371 : 1,077,561.90 = 318,904.38 : x
  2. Step 2: Convert to fraction form
    718,371/1,077,561.90 = 318,904.38/x
  3. Step 3: Cross multiply
    718,371x = 1,077,561.90 × 318,904.38
  4. Step 4: Simplify right side
    718,371x = 343,639,209,631.12
  5. Step 5: Solve for x
    x = 343,639,209,631.12/718,371
  6. Step 6: Final answer
    x = 478,358.97

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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.