Home / 421,276.96-581,027.55-318,254.68

Finding the Fourth Proportional to 421,276.96, 581,027.55 and 318,254.68

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Solution

The fourth proportional to 421,276.96, 581,027.55 and 318,254.68 is: 438,938.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,276.96 : 581,027.55 = 318,254.68 : x
  2. Step 2: Convert to fraction form
    421,276.96/581,027.55 = 318,254.68/x
  3. Step 3: Cross multiply
    421,276.96x = 581,027.55 × 318,254.68
  4. Step 4: Simplify right side
    421,276.96x = 184,914,736,996.43
  5. Step 5: Solve for x
    x = 184,914,736,996.43/421,276.96
  6. Step 6: Final answer
    x = 438,938.64

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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.