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Finding the Fourth Proportional to 378,603.80, 523,153.63 and 287,802.12

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Solution

The fourth proportional to 378,603.80, 523,153.63 and 287,802.12 is: 397,684.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,603.80 : 523,153.63 = 287,802.12 : x
  2. Step 2: Convert to fraction form
    378,603.80/523,153.63 = 287,802.12/x
  3. Step 3: Cross multiply
    378,603.80x = 523,153.63 × 287,802.12
  4. Step 4: Simplify right side
    378,603.80x = 150,564,723,799.70
  5. Step 5: Solve for x
    x = 150,564,723,799.70/378,603.80
  6. Step 6: Final answer
    x = 397,684.13

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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.