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Finding the Fourth Proportional to 641,157.50, 884,720.80 and 354,638.64

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Solution

The fourth proportional to 641,157.50, 884,720.80 and 354,638.64 is: 489,358.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,157.50 : 884,720.80 = 354,638.64 : x
  2. Step 2: Convert to fraction form
    641,157.50/884,720.80 = 354,638.64/x
  3. Step 3: Cross multiply
    641,157.50x = 884,720.80 × 354,638.64
  4. Step 4: Simplify right side
    641,157.50x = 313,756,181,291.71
  5. Step 5: Solve for x
    x = 313,756,181,291.71/641,157.50
  6. Step 6: Final answer
    x = 489,358.98

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1.5x scale

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.