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Finding the Fourth Proportional to 528,851.90, 792,111.45 and 318,122.30

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Solution

The fourth proportional to 528,851.90, 792,111.45 and 318,122.30 is: 476,481.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,851.90 : 792,111.45 = 318,122.30 : x
  2. Step 2: Convert to fraction form
    528,851.90/792,111.45 = 318,122.30/x
  3. Step 3: Cross multiply
    528,851.90x = 792,111.45 × 318,122.30
  4. Step 4: Simplify right side
    528,851.90x = 251,988,316,330.34
  5. Step 5: Solve for x
    x = 251,988,316,330.34/528,851.90
  6. Step 6: Final answer
    x = 476,481.82

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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.