Home / 426,377.40-638,723.70-276,721.80

Finding the Fourth Proportional to 426,377.40, 638,723.70 and 276,721.80

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Solution

The fourth proportional to 426,377.40, 638,723.70 and 276,721.80 is: 414,535.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,377.40 : 638,723.70 = 276,721.80 : x
  2. Step 2: Convert to fraction form
    426,377.40/638,723.70 = 276,721.80/x
  3. Step 3: Cross multiply
    426,377.40x = 638,723.70 × 276,721.80
  4. Step 4: Simplify right side
    426,377.40x = 176,748,771,966.66
  5. Step 5: Solve for x
    x = 176,748,771,966.66/426,377.40
  6. Step 6: Final answer
    x = 414,535.98

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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.