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Finding the Fourth Proportional to 528,615.48, 792,699.66 and 212,987.64

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Solution

The fourth proportional to 528,615.48, 792,699.66 and 212,987.64 is: 319,391.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,615.48 : 792,699.66 = 212,987.64 : x
  2. Step 2: Convert to fraction form
    528,615.48/792,699.66 = 212,987.64/x
  3. Step 3: Cross multiply
    528,615.48x = 792,699.66 × 212,987.64
  4. Step 4: Simplify right side
    528,615.48x = 168,835,229,812.20
  5. Step 5: Solve for x
    x = 168,835,229,812.20/528,615.48
  6. Step 6: Final answer
    x = 319,391.38

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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.