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Finding the Fourth Proportional to 395,090.64, 592,730.28 and 128,851.38

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Solution

The fourth proportional to 395,090.64, 592,730.28 and 128,851.38 is: 193,307.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,090.64 : 592,730.28 = 128,851.38 : x
  2. Step 2: Convert to fraction form
    395,090.64/592,730.28 = 128,851.38/x
  3. Step 3: Cross multiply
    395,090.64x = 592,730.28 × 128,851.38
  4. Step 4: Simplify right side
    395,090.64x = 76,374,114,545.79
  5. Step 5: Solve for x
    x = 76,374,114,545.79/395,090.64
  6. Step 6: Final answer
    x = 193,307.83

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.