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Finding the Fourth Proportional to 528,081.20, 792,510.60 and 212,764.40

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Solution

The fourth proportional to 528,081.20, 792,510.60 and 212,764.40 is: 319,303.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,081.20 : 792,510.60 = 212,764.40 : x
  2. Step 2: Convert to fraction form
    528,081.20/792,510.60 = 212,764.40/x
  3. Step 3: Cross multiply
    528,081.20x = 792,510.60 × 212,764.40
  4. Step 4: Simplify right side
    528,081.20x = 168,618,042,302.64
  5. Step 5: Solve for x
    x = 168,618,042,302.64/528,081.20
  6. Step 6: Final answer
    x = 319,303.25

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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.