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Finding the Fourth Proportional to 371,993.71, 513,391.45 and 210,831.45

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Solution

The fourth proportional to 371,993.71, 513,391.45 and 210,831.45 is: 290,970.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,993.71 : 513,391.45 = 210,831.45 : x
  2. Step 2: Convert to fraction form
    371,993.71/513,391.45 = 210,831.45/x
  3. Step 3: Cross multiply
    371,993.71x = 513,391.45 × 210,831.45
  4. Step 4: Simplify right side
    371,993.71x = 108,239,065,737.77
  5. Step 5: Solve for x
    x = 108,239,065,737.77/371,993.71
  6. Step 6: Final answer
    x = 290,970.15

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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.