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Finding the Fourth Proportional to 378,123.80, 566,651.10 and 209,718.32

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Solution

The fourth proportional to 378,123.80, 566,651.10 and 209,718.32 is: 314,280.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,123.80 : 566,651.10 = 209,718.32 : x
  2. Step 2: Convert to fraction form
    378,123.80/566,651.10 = 209,718.32/x
  3. Step 3: Cross multiply
    378,123.80x = 566,651.10 × 209,718.32
  4. Step 4: Simplify right side
    378,123.80x = 118,837,116,718.15
  5. Step 5: Solve for x
    x = 118,837,116,718.15/378,123.80
  6. Step 6: Final answer
    x = 314,280.98

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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.