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Finding the Fourth Proportional to 989,450, 1,484,416.56 and 315,531.32

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Solution

The fourth proportional to 989,450, 1,484,416.56 and 315,531.32 is: 473,374.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,450 : 1,484,416.56 = 315,531.32 : x
  2. Step 2: Convert to fraction form
    989,450/1,484,416.56 = 315,531.32/x
  3. Step 3: Cross multiply
    989,450x = 1,484,416.56 × 315,531.32
  4. Step 4: Simplify right side
    989,450x = 468,379,916,606.66
  5. Step 5: Solve for x
    x = 468,379,916,606.66/989,450
  6. Step 6: Final answer
    x = 473,374.01

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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.