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Finding the Fourth Proportional to 528,859.20, 793,742.40 and 213,542.40

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Solution

The fourth proportional to 528,859.20, 793,742.40 and 213,542.40 is: 320,496.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,859.20 : 793,742.40 = 213,542.40 : x
  2. Step 2: Convert to fraction form
    528,859.20/793,742.40 = 213,542.40/x
  3. Step 3: Cross multiply
    528,859.20x = 793,742.40 × 213,542.40
  4. Step 4: Simplify right side
    528,859.20x = 169,497,657,077.76
  5. Step 5: Solve for x
    x = 169,497,657,077.76/528,859.20
  6. Step 6: Final answer
    x = 320,496.75

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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.