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Finding the Fourth Proportional to 425,208.36, 587,348.40 and 317,591.76

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Solution

The fourth proportional to 425,208.36, 587,348.40 and 317,591.76 is: 438,695.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,208.36 : 587,348.40 = 317,591.76 : x
  2. Step 2: Convert to fraction form
    425,208.36/587,348.40 = 317,591.76/x
  3. Step 3: Cross multiply
    425,208.36x = 587,348.40 × 317,591.76
  4. Step 4: Simplify right side
    425,208.36x = 186,537,012,089.18
  5. Step 5: Solve for x
    x = 186,537,012,089.18/425,208.36
  6. Step 6: Final answer
    x = 438,695.54

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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.