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Finding the Fourth Proportional to 528,860.20, 793,743.90 and 213,543.40

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Solution

The fourth proportional to 528,860.20, 793,743.90 and 213,543.40 is: 320,498.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,860.20 : 793,743.90 = 213,543.40 : x
  2. Step 2: Convert to fraction form
    528,860.20/793,743.90 = 213,543.40/x
  3. Step 3: Cross multiply
    528,860.20x = 793,743.90 × 213,543.40
  4. Step 4: Simplify right side
    528,860.20x = 169,498,771,135.26
  5. Step 5: Solve for x
    x = 169,498,771,135.26/528,860.20
  6. Step 6: Final answer
    x = 320,498.25

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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.