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Finding the Fourth Proportional to 553,615.90, 830,812.65 and 354,420.70

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Solution

The fourth proportional to 553,615.90, 830,812.65 and 354,420.70 is: 531,879.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,615.90 : 830,812.65 = 354,420.70 : x
  2. Step 2: Convert to fraction form
    553,615.90/830,812.65 = 354,420.70/x
  3. Step 3: Cross multiply
    553,615.90x = 830,812.65 × 354,420.70
  4. Step 4: Simplify right side
    553,615.90x = 294,457,200,981.86
  5. Step 5: Solve for x
    x = 294,457,200,981.86/553,615.90
  6. Step 6: Final answer
    x = 531,879.96

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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.