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Finding the Fourth Proportional to 442,890.40, 664,335.60 and 354,316.90

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Solution

The fourth proportional to 442,890.40, 664,335.60 and 354,316.90 is: 531,475.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    442,890.40 : 664,335.60 = 354,316.90 : x
  2. Step 2: Convert to fraction form
    442,890.40/664,335.60 = 354,316.90/x
  3. Step 3: Cross multiply
    442,890.40x = 664,335.60 × 354,316.90
  4. Step 4: Simplify right side
    442,890.40x = 235,385,330,351.64
  5. Step 5: Solve for x
    x = 235,385,330,351.64/442,890.40
  6. Step 6: Final answer
    x = 531,475.35

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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.