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Finding the Fourth Proportional to 555,215.40, 831,656.70 and 305,605.80

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Solution

The fourth proportional to 555,215.40, 831,656.70 and 305,605.80 is: 457,766.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,215.40 : 831,656.70 = 305,605.80 : x
  2. Step 2: Convert to fraction form
    555,215.40/831,656.70 = 305,605.80/x
  3. Step 3: Cross multiply
    555,215.40x = 831,656.70 × 305,605.80
  4. Step 4: Simplify right side
    555,215.40x = 254,159,111,128.86
  5. Step 5: Solve for x
    x = 254,159,111,128.86/555,215.40
  6. Step 6: Final answer
    x = 457,766.68

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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.