Home / 389,721.60-584,582.40-109,286.40

Finding the Fourth Proportional to 389,721.60, 584,582.40 and 109,286.40

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Solution

The fourth proportional to 389,721.60, 584,582.40 and 109,286.40 is: 163,929.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,721.60 : 584,582.40 = 109,286.40 : x
  2. Step 2: Convert to fraction form
    389,721.60/584,582.40 = 109,286.40/x
  3. Step 3: Cross multiply
    389,721.60x = 584,582.40 × 109,286.40
  4. Step 4: Simplify right side
    389,721.60x = 63,886,905,999.36
  5. Step 5: Solve for x
    x = 63,886,905,999.36/389,721.60
  6. Step 6: Final answer
    x = 163,929.60

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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.