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Finding the Fourth Proportional to 425,572.11, 587,330.91 and 317,955.31

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Solution

The fourth proportional to 425,572.11, 587,330.91 and 317,955.31 is: 438,809.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,572.11 : 587,330.91 = 317,955.31 : x
  2. Step 2: Convert to fraction form
    425,572.11/587,330.91 = 317,955.31/x
  3. Step 3: Cross multiply
    425,572.11x = 587,330.91 × 317,955.31
  4. Step 4: Simplify right side
    425,572.11x = 186,744,980,093.31
  5. Step 5: Solve for x
    x = 186,744,980,093.31/425,572.11
  6. Step 6: Final answer
    x = 438,809.25

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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.