Home / 591,431.76-815,326.14-421,370.64

Finding the Fourth Proportional to 591,431.76, 815,326.14 and 421,370.64

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Solution

The fourth proportional to 591,431.76, 815,326.14 and 421,370.64 is: 580,886.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    591,431.76 : 815,326.14 = 421,370.64 : x
  2. Step 2: Convert to fraction form
    591,431.76/815,326.14 = 421,370.64/x
  3. Step 3: Cross multiply
    591,431.76x = 815,326.14 × 421,370.64
  4. Step 4: Simplify right side
    591,431.76x = 343,554,497,420.53
  5. Step 5: Solve for x
    x = 343,554,497,420.53/591,431.76
  6. Step 6: Final answer
    x = 580,886.12

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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.