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Finding the Fourth Proportional to 615,420.16, 848,610.30 and 400,161.04

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Solution

The fourth proportional to 615,420.16, 848,610.30 and 400,161.04 is: 551,786.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,420.16 : 848,610.30 = 400,161.04 : x
  2. Step 2: Convert to fraction form
    615,420.16/848,610.30 = 400,161.04/x
  3. Step 3: Cross multiply
    615,420.16x = 848,610.30 × 400,161.04
  4. Step 4: Simplify right side
    615,420.16x = 339,580,779,581.79
  5. Step 5: Solve for x
    x = 339,580,779,581.79/615,420.16
  6. Step 6: Final answer
    x = 551,786.90

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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.