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Finding the Fourth Proportional to 528,606.48, 792,686.16 and 212,978.64

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Solution

The fourth proportional to 528,606.48, 792,686.16 and 212,978.64 is: 319,377.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,606.48 : 792,686.16 = 212,978.64 : x
  2. Step 2: Convert to fraction form
    528,606.48/792,686.16 = 212,978.64/x
  3. Step 3: Cross multiply
    528,606.48x = 792,686.16 × 212,978.64
  4. Step 4: Simplify right side
    528,606.48x = 168,825,220,303.62
  5. Step 5: Solve for x
    x = 168,825,220,303.62/528,606.48
  6. Step 6: Final answer
    x = 319,377.89

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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.