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Finding the Fourth Proportional to 317,604.21, 478,307.76 and 289,260.69

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Solution

The fourth proportional to 317,604.21, 478,307.76 and 289,260.69 is: 435,622.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,604.21 : 478,307.76 = 289,260.69 : x
  2. Step 2: Convert to fraction form
    317,604.21/478,307.76 = 289,260.69/x
  3. Step 3: Cross multiply
    317,604.21x = 478,307.76 × 289,260.69
  4. Step 4: Simplify right side
    317,604.21x = 138,355,632,689.95
  5. Step 5: Solve for x
    x = 138,355,632,689.95/317,604.21
  6. Step 6: Final answer
    x = 435,622.79

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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.