Home / 783,732.21-1,175,931.18-428,331.03

Finding the Fourth Proportional to 783,732.21, 1,175,931.18 and 428,331.03

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Solution

The fourth proportional to 783,732.21, 1,175,931.18 and 428,331.03 is: 642,678.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    783,732.21 : 1,175,931.18 = 428,331.03 : x
  2. Step 2: Convert to fraction form
    783,732.21/1,175,931.18 = 428,331.03/x
  3. Step 3: Cross multiply
    783,732.21x = 1,175,931.18 × 428,331.03
  4. Step 4: Simplify right side
    783,732.21x = 503,687,813,538.52
  5. Step 5: Solve for x
    x = 503,687,813,538.52/783,732.21
  6. Step 6: Final answer
    x = 642,678.46

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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.