Home / 485,834.23-670,104.21-421,187.95

Finding the Fourth Proportional to 485,834.23, 670,104.21 and 421,187.95

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Solution

The fourth proportional to 485,834.23, 670,104.21 and 421,187.95 is: 580,938.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,834.23 : 670,104.21 = 421,187.95 : x
  2. Step 2: Convert to fraction form
    485,834.23/670,104.21 = 421,187.95/x
  3. Step 3: Cross multiply
    485,834.23x = 670,104.21 × 421,187.95
  4. Step 4: Simplify right side
    485,834.23x = 282,239,818,496.27
  5. Step 5: Solve for x
    x = 282,239,818,496.27/485,834.23
  6. Step 6: Final answer
    x = 580,938.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.