Home / 861,212.66-1,290,509.21-411,313.95

Finding the Fourth Proportional to 861,212.66, 1,290,509.21 and 411,313.95

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Solution

The fourth proportional to 861,212.66, 1,290,509.21 and 411,313.95 is: 616,345.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    861,212.66 : 1,290,509.21 = 411,313.95 : x
  2. Step 2: Convert to fraction form
    861,212.66/1,290,509.21 = 411,313.95/x
  3. Step 3: Cross multiply
    861,212.66x = 1,290,509.21 × 411,313.95
  4. Step 4: Simplify right side
    861,212.66x = 530,804,441,704.76
  5. Step 5: Solve for x
    x = 530,804,441,704.76/861,212.66
  6. Step 6: Final answer
    x = 616,345.38

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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.