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Finding the Fourth Proportional to 390,647.69, 586,030.03 and 141,388.01

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Solution

The fourth proportional to 390,647.69, 586,030.03 and 141,388.01 is: 212,103.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,647.69 : 586,030.03 = 141,388.01 : x
  2. Step 2: Convert to fraction form
    390,647.69/586,030.03 = 141,388.01/x
  3. Step 3: Cross multiply
    390,647.69x = 586,030.03 × 141,388.01
  4. Step 4: Simplify right side
    390,647.69x = 82,857,619,741.94
  5. Step 5: Solve for x
    x = 82,857,619,741.94/390,647.69
  6. Step 6: Final answer
    x = 212,103.19

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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.