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Finding the Fourth Proportional to 553,615.40, 830,811.90 and 354,420.20

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Solution

The fourth proportional to 553,615.40, 830,811.90 and 354,420.20 is: 531,879.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,615.40 : 830,811.90 = 354,420.20 : x
  2. Step 2: Convert to fraction form
    553,615.40/830,811.90 = 354,420.20/x
  3. Step 3: Cross multiply
    553,615.40x = 830,811.90 × 354,420.20
  4. Step 4: Simplify right side
    553,615.40x = 294,456,519,760.38
  5. Step 5: Solve for x
    x = 294,456,519,760.38/553,615.40
  6. Step 6: Final answer
    x = 531,879.21

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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.