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Finding the Fourth Proportional to 610,215.40, 915,323.10 and 210,820.60

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Solution

The fourth proportional to 610,215.40, 915,323.10 and 210,820.60 is: 316,230.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    610,215.40 : 915,323.10 = 210,820.60 : x
  2. Step 2: Convert to fraction form
    610,215.40/915,323.10 = 210,820.60/x
  3. Step 3: Cross multiply
    610,215.40x = 915,323.10 × 210,820.60
  4. Step 4: Simplify right side
    610,215.40x = 192,968,965,135.86
  5. Step 5: Solve for x
    x = 192,968,965,135.86/610,215.40
  6. Step 6: Final answer
    x = 316,230.90

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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.