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Finding the Fourth Proportional to 528,080.20, 792,509.10 and 212,763.40

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Solution

The fourth proportional to 528,080.20, 792,509.10 and 212,763.40 is: 319,301.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,080.20 : 792,509.10 = 212,763.40 : x
  2. Step 2: Convert to fraction form
    528,080.20/792,509.10 = 212,763.40/x
  3. Step 3: Cross multiply
    528,080.20x = 792,509.10 × 212,763.40
  4. Step 4: Simplify right side
    528,080.20x = 168,616,930,646.94
  5. Step 5: Solve for x
    x = 168,616,930,646.94/528,080.20
  6. Step 6: Final answer
    x = 319,301.75

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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.