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Finding the Fourth Proportional to 553,578.15, 763,845.34 and 308,509.38

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Solution

The fourth proportional to 553,578.15, 763,845.34 and 308,509.38 is: 425,691.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,578.15 : 763,845.34 = 308,509.38 : x
  2. Step 2: Convert to fraction form
    553,578.15/763,845.34 = 308,509.38/x
  3. Step 3: Cross multiply
    553,578.15x = 763,845.34 × 308,509.38
  4. Step 4: Simplify right side
    553,578.15x = 235,653,452,259.29
  5. Step 5: Solve for x
    x = 235,653,452,259.29/553,578.15
  6. Step 6: Final answer
    x = 425,691.39

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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.