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Finding the Fourth Proportional to 390,683.91, 586,068.84 and 124,351.05

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Solution

The fourth proportional to 390,683.91, 586,068.84 and 124,351.05 is: 186,540.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,683.91 : 586,068.84 = 124,351.05 : x
  2. Step 2: Convert to fraction form
    390,683.91/586,068.84 = 124,351.05/x
  3. Step 3: Cross multiply
    390,683.91x = 586,068.84 × 124,351.05
  4. Step 4: Simplify right side
    390,683.91x = 72,878,275,626.28
  5. Step 5: Solve for x
    x = 72,878,275,626.28/390,683.91
  6. Step 6: Final answer
    x = 186,540.25

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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.