Home / 783,742.72-1,175,946.94-428,341.52

Finding the Fourth Proportional to 783,742.72, 1,175,946.94 and 428,341.52

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Solution

The fourth proportional to 783,742.72, 1,175,946.94 and 428,341.52 is: 642,694.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    783,742.72 : 1,175,946.94 = 428,341.52 : x
  2. Step 2: Convert to fraction form
    783,742.72/1,175,946.94 = 428,341.52/x
  3. Step 3: Cross multiply
    783,742.72x = 1,175,946.94 × 428,341.52
  4. Step 4: Simplify right side
    783,742.72x = 503,706,899,718.95
  5. Step 5: Solve for x
    x = 503,706,899,718.95/783,742.72
  6. Step 6: Final answer
    x = 642,694.20

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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.