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Finding the Fourth Proportional to 553,144.80, 763,435.14 and 320,539.14

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Solution

The fourth proportional to 553,144.80, 763,435.14 and 320,539.14 is: 442,399.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,144.80 : 763,435.14 = 320,539.14 : x
  2. Step 2: Convert to fraction form
    553,144.80/763,435.14 = 320,539.14/x
  3. Step 3: Cross multiply
    553,144.80x = 763,435.14 × 320,539.14
  4. Step 4: Simplify right side
    553,144.80x = 244,710,843,221.38
  5. Step 5: Solve for x
    x = 244,710,843,221.38/553,144.80
  6. Step 6: Final answer
    x = 442,399.25

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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.