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Finding the Fourth Proportional to 628,618.16, 867,493 and 342,140.29

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Solution

The fourth proportional to 628,618.16, 867,493 and 342,140.29 is: 472,153.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,618.16 : 867,493 = 342,140.29 : x
  2. Step 2: Convert to fraction form
    628,618.16/867,493 = 342,140.29/x
  3. Step 3: Cross multiply
    628,618.16x = 867,493 × 342,140.29
  4. Step 4: Simplify right side
    628,618.16x = 296,804,306,592.97
  5. Step 5: Solve for x
    x = 296,804,306,592.97/628,618.16
  6. Step 6: Final answer
    x = 472,153.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.