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Finding the Fourth Proportional to 390,458.62, 585,018.66 and 262,134.54

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Solution

The fourth proportional to 390,458.62, 585,018.66 and 262,134.54 is: 392,752.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,458.62 : 585,018.66 = 262,134.54 : x
  2. Step 2: Convert to fraction form
    390,458.62/585,018.66 = 262,134.54/x
  3. Step 3: Cross multiply
    390,458.62x = 585,018.66 × 262,134.54
  4. Step 4: Simplify right side
    390,458.62x = 153,353,597,330.52
  5. Step 5: Solve for x
    x = 153,353,597,330.52/390,458.62
  6. Step 6: Final answer
    x = 392,752.50

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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.