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Finding the Fourth Proportional to 643,872.40, 965,765.40 and 170,547.60

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Solution

The fourth proportional to 643,872.40, 965,765.40 and 170,547.60 is: 255,809.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,872.40 : 965,765.40 = 170,547.60 : x
  2. Step 2: Convert to fraction form
    643,872.40/965,765.40 = 170,547.60/x
  3. Step 3: Cross multiply
    643,872.40x = 965,765.40 × 170,547.60
  4. Step 4: Simplify right side
    643,872.40x = 164,708,971,133.04
  5. Step 5: Solve for x
    x = 164,708,971,133.04/643,872.40
  6. Step 6: Final answer
    x = 255,809.96

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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.