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Finding the Fourth Proportional to 628,012.40, 942,165.60 and 207,287.86

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Solution

The fourth proportional to 628,012.40, 942,165.60 and 207,287.86 is: 310,980.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,012.40 : 942,165.60 = 207,287.86 : x
  2. Step 2: Convert to fraction form
    628,012.40/942,165.60 = 207,287.86/x
  3. Step 3: Cross multiply
    628,012.40x = 942,165.60 × 207,287.86
  4. Step 4: Simplify right side
    628,012.40x = 195,299,490,989.62
  5. Step 5: Solve for x
    x = 195,299,490,989.62/628,012.40
  6. Step 6: Final answer
    x = 310,980.31

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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.