Home / 671,427.20-1,007,140.80-387,603.20

Finding the Fourth Proportional to 671,427.20, 1,007,140.80 and 387,603.20

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Solution

The fourth proportional to 671,427.20, 1,007,140.80 and 387,603.20 is: 581,404.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    671,427.20 : 1,007,140.80 = 387,603.20 : x
  2. Step 2: Convert to fraction form
    671,427.20/1,007,140.80 = 387,603.20/x
  3. Step 3: Cross multiply
    671,427.20x = 1,007,140.80 × 387,603.20
  4. Step 4: Simplify right side
    671,427.20x = 390,370,996,930.56
  5. Step 5: Solve for x
    x = 390,370,996,930.56/671,427.20
  6. Step 6: Final answer
    x = 581,404.80

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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.