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Finding the Fourth Proportional to 354,345.36, 488,599.34 and 289,613.72

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Solution

The fourth proportional to 354,345.36, 488,599.34 and 289,613.72 is: 399,342.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,345.36 : 488,599.34 = 289,613.72 : x
  2. Step 2: Convert to fraction form
    354,345.36/488,599.34 = 289,613.72/x
  3. Step 3: Cross multiply
    354,345.36x = 488,599.34 × 289,613.72
  4. Step 4: Simplify right side
    354,345.36x = 141,505,068,555.88
  5. Step 5: Solve for x
    x = 141,505,068,555.88/354,345.36
  6. Step 6: Final answer
    x = 399,342.24

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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.