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Finding the Fourth Proportional to 355,933.79, 491,417.86 and 317,627.46

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Solution

The fourth proportional to 355,933.79, 491,417.86 and 317,627.46 is: 438,530.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,933.79 : 491,417.86 = 317,627.46 : x
  2. Step 2: Convert to fraction form
    355,933.79/491,417.86 = 317,627.46/x
  3. Step 3: Cross multiply
    355,933.79x = 491,417.86 × 317,627.46
  4. Step 4: Simplify right side
    355,933.79x = 156,087,806,670.44
  5. Step 5: Solve for x
    x = 156,087,806,670.44/355,933.79
  6. Step 6: Final answer
    x = 438,530.45

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1.5x scale

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.