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Finding the Fourth Proportional to 342,866.20, 478,831.70 and 342,866.20

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Solution

The fourth proportional to 342,866.20, 478,831.70 and 342,866.20 is: 478,831.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,866.20 : 478,831.70 = 342,866.20 : x
  2. Step 2: Convert to fraction form
    342,866.20/478,831.70 = 342,866.20/x
  3. Step 3: Cross multiply
    342,866.20x = 478,831.70 × 342,866.20
  4. Step 4: Simplify right side
    342,866.20x = 164,175,205,418.54
  5. Step 5: Solve for x
    x = 164,175,205,418.54/342,866.20
  6. Step 6: Final answer
    x = 478,831.70

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.