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Finding the Fourth Proportional to 660,878.70, 989,173.29 and 356,850.21

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Solution

The fourth proportional to 660,878.70, 989,173.29 and 356,850.21 is: 534,117.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,878.70 : 989,173.29 = 356,850.21 : x
  2. Step 2: Convert to fraction form
    660,878.70/989,173.29 = 356,850.21/x
  3. Step 3: Cross multiply
    660,878.70x = 989,173.29 × 356,850.21
  4. Step 4: Simplify right side
    660,878.70x = 352,986,696,262.89
  5. Step 5: Solve for x
    x = 352,986,696,262.89/660,878.70
  6. Step 6: Final answer
    x = 534,117.22

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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.