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Finding the Fourth Proportional to 528,847.20, 793,724.40 and 213,530.40

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Solution

The fourth proportional to 528,847.20, 793,724.40 and 213,530.40 is: 320,478.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,847.20 : 793,724.40 = 213,530.40 : x
  2. Step 2: Convert to fraction form
    528,847.20/793,724.40 = 213,530.40/x
  3. Step 3: Cross multiply
    528,847.20x = 793,724.40 × 213,530.40
  4. Step 4: Simplify right side
    528,847.20x = 169,484,288,621.76
  5. Step 5: Solve for x
    x = 169,484,288,621.76/528,847.20
  6. Step 6: Final answer
    x = 320,478.75

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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.