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Finding the Fourth Proportional to 628,920.32, 867,912.12 and 342,442.13

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Solution

The fourth proportional to 628,920.32, 867,912.12 and 342,442.13 is: 472,571.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,920.32 : 867,912.12 = 342,442.13 : x
  2. Step 2: Convert to fraction form
    628,920.32/867,912.12 = 342,442.13/x
  3. Step 3: Cross multiply
    628,920.32x = 867,912.12 × 342,442.13
  4. Step 4: Simplify right side
    628,920.32x = 297,209,670,686.06
  5. Step 5: Solve for x
    x = 297,209,670,686.06/628,920.32
  6. Step 6: Final answer
    x = 472,571.27

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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.