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Finding the Fourth Proportional to 715,036.48, 986,706.72 and 392,683.84

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Solution

The fourth proportional to 715,036.48, 986,706.72 and 392,683.84 is: 541,879.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,036.48 : 986,706.72 = 392,683.84 : x
  2. Step 2: Convert to fraction form
    715,036.48/986,706.72 = 392,683.84/x
  3. Step 3: Cross multiply
    715,036.48x = 986,706.72 × 392,683.84
  4. Step 4: Simplify right side
    715,036.48x = 387,463,783,763.41
  5. Step 5: Solve for x
    x = 387,463,783,763.41/715,036.48
  6. Step 6: Final answer
    x = 541,879.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.