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Finding the Fourth Proportional to 210,328.80, 314,974.80 and 139,826.40

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Solution

The fourth proportional to 210,328.80, 314,974.80 and 139,826.40 is: 209,394.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,328.80 : 314,974.80 = 139,826.40 : x
  2. Step 2: Convert to fraction form
    210,328.80/314,974.80 = 139,826.40/x
  3. Step 3: Cross multiply
    210,328.80x = 314,974.80 × 139,826.40
  4. Step 4: Simplify right side
    210,328.80x = 44,041,792,374.72
  5. Step 5: Solve for x
    x = 44,041,792,374.72/210,328.80
  6. Step 6: Final answer
    x = 209,394.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.