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Finding the Fourth Proportional to 390,532.35, 586,131.36 and 154,041.11

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Solution

The fourth proportional to 390,532.35, 586,131.36 and 154,041.11 is: 231,192.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,532.35 : 586,131.36 = 154,041.11 : x
  2. Step 2: Convert to fraction form
    390,532.35/586,131.36 = 154,041.11/x
  3. Step 3: Cross multiply
    390,532.35x = 586,131.36 × 154,041.11
  4. Step 4: Simplify right side
    390,532.35x = 90,288,323,989.89
  5. Step 5: Solve for x
    x = 90,288,323,989.89/390,532.35
  6. Step 6: Final answer
    x = 231,192.94

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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.