Home / 378,172.14-521,888.49-208,417.20

Finding the Fourth Proportional to 378,172.14, 521,888.49 and 208,417.20

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Solution

The fourth proportional to 378,172.14, 521,888.49 and 208,417.20 is: 287,621.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,172.14 : 521,888.49 = 208,417.20 : x
  2. Step 2: Convert to fraction form
    378,172.14/521,888.49 = 208,417.20/x
  3. Step 3: Cross multiply
    378,172.14x = 521,888.49 × 208,417.20
  4. Step 4: Simplify right side
    378,172.14x = 108,770,537,798.03
  5. Step 5: Solve for x
    x = 108,770,537,798.03/378,172.14
  6. Step 6: Final answer
    x = 287,621.76

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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.