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Finding the Fourth Proportional to 671,010.48, 925,987.28 and 399,072.42

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Solution

The fourth proportional to 671,010.48, 925,987.28 and 399,072.42 is: 550,715.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    671,010.48 : 925,987.28 = 399,072.42 : x
  2. Step 2: Convert to fraction form
    671,010.48/925,987.28 = 399,072.42/x
  3. Step 3: Cross multiply
    671,010.48x = 925,987.28 × 399,072.42
  4. Step 4: Simplify right side
    671,010.48x = 369,535,984,718.82
  5. Step 5: Solve for x
    x = 369,535,984,718.82/671,010.48
  6. Step 6: Final answer
    x = 550,715.67

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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.