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Finding the Fourth Proportional to 628,091.48, 866,991.74 and 373,442.06

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Solution

The fourth proportional to 628,091.48, 866,991.74 and 373,442.06 is: 515,484.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,091.48 : 866,991.74 = 373,442.06 : x
  2. Step 2: Convert to fraction form
    628,091.48/866,991.74 = 373,442.06/x
  3. Step 3: Cross multiply
    628,091.48x = 866,991.74 × 373,442.06
  4. Step 4: Simplify right side
    628,091.48x = 323,771,181,688.85
  5. Step 5: Solve for x
    x = 323,771,181,688.85/628,091.48
  6. Step 6: Final answer
    x = 515,484.11

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.