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Finding the Fourth Proportional to 390,665.77, 586,109.60 and 124,446.82

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Solution

The fourth proportional to 390,665.77, 586,109.60 and 124,446.82 is: 186,705.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,665.77 : 586,109.60 = 124,446.82 : x
  2. Step 2: Convert to fraction form
    390,665.77/586,109.60 = 124,446.82/x
  3. Step 3: Cross multiply
    390,665.77x = 586,109.60 × 124,446.82
  4. Step 4: Simplify right side
    390,665.77x = 72,939,475,891.47
  5. Step 5: Solve for x
    x = 72,939,475,891.47/390,665.77
  6. Step 6: Final answer
    x = 186,705.57

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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.