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Finding the Fourth Proportional to 989,449, 1,484,415.06 and 315,530.32

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Solution

The fourth proportional to 989,449, 1,484,415.06 and 315,530.32 is: 473,372.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,449 : 1,484,415.06 = 315,530.32 : x
  2. Step 2: Convert to fraction form
    989,449/1,484,415.06 = 315,530.32/x
  3. Step 3: Cross multiply
    989,449x = 1,484,415.06 × 315,530.32
  4. Step 4: Simplify right side
    989,449x = 468,377,958,894.62
  5. Step 5: Solve for x
    x = 468,377,958,894.62/989,449
  6. Step 6: Final answer
    x = 473,372.51

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.