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Finding the Fourth Proportional to 399,036.32, 549,910.32 and 285,662.24

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Solution

The fourth proportional to 399,036.32, 549,910.32 and 285,662.24 is: 393,669.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,036.32 : 549,910.32 = 285,662.24 : x
  2. Step 2: Convert to fraction form
    399,036.32/549,910.32 = 285,662.24/x
  3. Step 3: Cross multiply
    399,036.32x = 549,910.32 × 285,662.24
  4. Step 4: Simplify right side
    399,036.32x = 157,088,613,810.32
  5. Step 5: Solve for x
    x = 157,088,613,810.32/399,036.32
  6. Step 6: Final answer
    x = 393,669.96

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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.