Home / 1,021,475.18-1,408,960.69-638,837.66

Finding the Fourth Proportional to 1,021,475.18, 1,408,960.69 and 638,837.66

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Solution

The fourth proportional to 1,021,475.18, 1,408,960.69 and 638,837.66 is: 881,173.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,021,475.18 : 1,408,960.69 = 638,837.66 : x
  2. Step 2: Convert to fraction form
    1,021,475.18/1,408,960.69 = 638,837.66/x
  3. Step 3: Cross multiply
    1,021,475.18x = 1,408,960.69 × 638,837.66
  4. Step 4: Simplify right side
    1,021,475.18x = 900,097,141,589.69
  5. Step 5: Solve for x
    x = 900,097,141,589.69/1,021,475.18
  6. Step 6: Final answer
    x = 881,173.78

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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.