Home / 651,535.12-977,315.64-428,319.28

Finding the Fourth Proportional to 651,535.12, 977,315.64 and 428,319.28

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Solution

The fourth proportional to 651,535.12, 977,315.64 and 428,319.28 is: 642,487.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,535.12 : 977,315.64 = 428,319.28 : x
  2. Step 2: Convert to fraction form
    651,535.12/977,315.64 = 428,319.28/x
  3. Step 3: Cross multiply
    651,535.12x = 977,315.64 × 428,319.28
  4. Step 4: Simplify right side
    651,535.12x = 418,603,131,257.54
  5. Step 5: Solve for x
    x = 418,603,131,257.54/651,535.12
  6. Step 6: Final answer
    x = 642,487.44

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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.