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Finding the Fourth Proportional to 699,311.04, 965,030.40 and 393,420.48

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Solution

The fourth proportional to 699,311.04, 965,030.40 and 393,420.48 is: 542,909.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,311.04 : 965,030.40 = 393,420.48 : x
  2. Step 2: Convert to fraction form
    699,311.04/965,030.40 = 393,420.48/x
  3. Step 3: Cross multiply
    699,311.04x = 965,030.40 × 393,420.48
  4. Step 4: Simplify right side
    699,311.04x = 379,662,723,182.59
  5. Step 5: Solve for x
    x = 379,662,723,182.59/699,311.04
  6. Step 6: Final answer
    x = 542,909.67

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.