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Finding the Fourth Proportional to 378,260.66, 521,993.48 and 208,510.58

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Solution

The fourth proportional to 378,260.66, 521,993.48 and 208,510.58 is: 287,741.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,260.66 : 521,993.48 = 208,510.58 : x
  2. Step 2: Convert to fraction form
    378,260.66/521,993.48 = 208,510.58/x
  3. Step 3: Cross multiply
    378,260.66x = 521,993.48 × 208,510.58
  4. Step 4: Simplify right side
    378,260.66x = 108,841,163,271.02
  5. Step 5: Solve for x
    x = 108,841,163,271.02/378,260.66
  6. Step 6: Final answer
    x = 287,741.17

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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.