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Finding the Fourth Proportional to 390,950.62, 586,500.27 and 134,715.22

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Solution

The fourth proportional to 390,950.62, 586,500.27 and 134,715.22 is: 202,098.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,950.62 : 586,500.27 = 134,715.22 : x
  2. Step 2: Convert to fraction form
    390,950.62/586,500.27 = 134,715.22/x
  3. Step 3: Cross multiply
    390,950.62x = 586,500.27 × 134,715.22
  4. Step 4: Simplify right side
    390,950.62x = 79,010,512,903.11
  5. Step 5: Solve for x
    x = 79,010,512,903.11/390,950.62
  6. Step 6: Final answer
    x = 202,098.45

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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.