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Finding the Fourth Proportional to 528,771.89, 791,484.60 and 338,978.63

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Solution

The fourth proportional to 528,771.89, 791,484.60 and 338,978.63 is: 507,395.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,771.89 : 791,484.60 = 338,978.63 : x
  2. Step 2: Convert to fraction form
    528,771.89/791,484.60 = 338,978.63/x
  3. Step 3: Cross multiply
    528,771.89x = 791,484.60 × 338,978.63
  4. Step 4: Simplify right side
    528,771.89x = 268,296,365,374.10
  5. Step 5: Solve for x
    x = 268,296,365,374.10/528,771.89
  6. Step 6: Final answer
    x = 507,395.29

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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.