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Finding the Fourth Proportional to 553,355.20, 830,032.80 and 343,403.20

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Solution

The fourth proportional to 553,355.20, 830,032.80 and 343,403.20 is: 515,104.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,355.20 : 830,032.80 = 343,403.20 : x
  2. Step 2: Convert to fraction form
    553,355.20/830,032.80 = 343,403.20/x
  3. Step 3: Cross multiply
    553,355.20x = 830,032.80 × 343,403.20
  4. Step 4: Simplify right side
    553,355.20x = 285,035,919,624.96
  5. Step 5: Solve for x
    x = 285,035,919,624.96/553,355.20
  6. Step 6: Final answer
    x = 515,104.80

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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.