Home / 783,732.45-1,175,931.54-428,331.28

Finding the Fourth Proportional to 783,732.45, 1,175,931.54 and 428,331.28

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Solution

The fourth proportional to 783,732.45, 1,175,931.54 and 428,331.28 is: 642,678.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    783,732.45 : 1,175,931.54 = 428,331.28 : x
  2. Step 2: Convert to fraction form
    783,732.45/1,175,931.54 = 428,331.28/x
  3. Step 3: Cross multiply
    783,732.45x = 1,175,931.54 × 428,331.28
  4. Step 4: Simplify right side
    783,732.45x = 503,688,261,720.57
  5. Step 5: Solve for x
    x = 503,688,261,720.57/783,732.45
  6. Step 6: Final answer
    x = 642,678.84

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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.