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Finding the Fourth Proportional to 660,247.61, 989,999.62 and 210,862.85

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Solution

The fourth proportional to 660,247.61, 989,999.62 and 210,862.85 is: 316,175.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,247.61 : 989,999.62 = 210,862.85 : x
  2. Step 2: Convert to fraction form
    660,247.61/989,999.62 = 210,862.85/x
  3. Step 3: Cross multiply
    660,247.61x = 989,999.62 × 210,862.85
  4. Step 4: Simplify right side
    660,247.61x = 208,754,135,894.96
  5. Step 5: Solve for x
    x = 208,754,135,894.96/660,247.61
  6. Step 6: Final answer
    x = 316,175.53

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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.