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Finding the Fourth Proportional to 628,617.22, 867,510.15 and 342,155.86

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Solution

The fourth proportional to 628,617.22, 867,510.15 and 342,155.86 is: 472,185.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,617.22 : 867,510.15 = 342,155.86 : x
  2. Step 2: Convert to fraction form
    628,617.22/867,510.15 = 342,155.86/x
  3. Step 3: Cross multiply
    628,617.22x = 867,510.15 × 342,155.86
  4. Step 4: Simplify right side
    628,617.22x = 296,823,681,431.98
  5. Step 5: Solve for x
    x = 296,823,681,431.98/628,617.22
  6. Step 6: Final answer
    x = 472,185.09

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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.