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Finding the Fourth Proportional to 390,722.82, 586,096.18 and 134,552.64

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Solution

The fourth proportional to 390,722.82, 586,096.18 and 134,552.64 is: 201,833.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,722.82 : 586,096.18 = 134,552.64 : x
  2. Step 2: Convert to fraction form
    390,722.82/586,096.18 = 134,552.64/x
  3. Step 3: Cross multiply
    390,722.82x = 586,096.18 × 134,552.64
  4. Step 4: Simplify right side
    390,722.82x = 78,860,788,312.92
  5. Step 5: Solve for x
    x = 78,860,788,312.92/390,722.82
  6. Step 6: Final answer
    x = 201,833.08

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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.