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Finding the Fourth Proportional to 399,224.02, 549,530.78 and 348,146.64

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Solution

The fourth proportional to 399,224.02, 549,530.78 and 348,146.64 is: 479,222.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,224.02 : 549,530.78 = 348,146.64 : x
  2. Step 2: Convert to fraction form
    399,224.02/549,530.78 = 348,146.64/x
  3. Step 3: Cross multiply
    399,224.02x = 549,530.78 × 348,146.64
  4. Step 4: Simplify right side
    399,224.02x = 191,317,290,145.19
  5. Step 5: Solve for x
    x = 191,317,290,145.19/399,224.02
  6. Step 6: Final answer
    x = 479,222.89

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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.