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Finding the Fourth Proportional to 528,815.20, 793,676.40 and 213,498.40

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Solution

The fourth proportional to 528,815.20, 793,676.40 and 213,498.40 is: 320,430.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,815.20 : 793,676.40 = 213,498.40 : x
  2. Step 2: Convert to fraction form
    528,815.20/793,676.40 = 213,498.40/x
  3. Step 3: Cross multiply
    528,815.20x = 793,676.40 × 213,498.40
  4. Step 4: Simplify right side
    528,815.20x = 169,448,641,517.76
  5. Step 5: Solve for x
    x = 169,448,641,517.76/528,815.20
  6. Step 6: Final answer
    x = 320,430.73

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1.5x scale

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.