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Finding the Fourth Proportional to 317,604.96, 478,308.90 and 289,261.44

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Solution

The fourth proportional to 317,604.96, 478,308.90 and 289,261.44 is: 435,623.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,604.96 : 478,308.90 = 289,261.44 : x
  2. Step 2: Convert to fraction form
    317,604.96/478,308.90 = 289,261.44/x
  3. Step 3: Cross multiply
    317,604.96x = 478,308.90 × 289,261.44
  4. Step 4: Simplify right side
    317,604.96x = 138,356,321,178.82
  5. Step 5: Solve for x
    x = 138,356,321,178.82/317,604.96
  6. Step 6: Final answer
    x = 435,623.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.