Home / 783,758.76-1,175,970.94-428,357.48

Finding the Fourth Proportional to 783,758.76, 1,175,970.94 and 428,357.48

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Solution

The fourth proportional to 783,758.76, 1,175,970.94 and 428,357.48 is: 642,718.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    783,758.76 : 1,175,970.94 = 428,357.48 : x
  2. Step 2: Convert to fraction form
    783,758.76/1,175,970.94 = 428,357.48/x
  3. Step 3: Cross multiply
    783,758.76x = 1,175,970.94 × 428,357.48
  4. Step 4: Simplify right side
    783,758.76x = 503,735,948,411.63
  5. Step 5: Solve for x
    x = 503,735,948,411.63/783,758.76
  6. Step 6: Final answer
    x = 642,718.11

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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.