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Finding the Fourth Proportional to 572,113.40, 857,910.90 and 217,009.40

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Solution

The fourth proportional to 572,113.40, 857,910.90 and 217,009.40 is: 325,415.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,113.40 : 857,910.90 = 217,009.40 : x
  2. Step 2: Convert to fraction form
    572,113.40/857,910.90 = 217,009.40/x
  3. Step 3: Cross multiply
    572,113.40x = 857,910.90 × 217,009.40
  4. Step 4: Simplify right side
    572,113.40x = 186,174,729,662.46
  5. Step 5: Solve for x
    x = 186,174,729,662.46/572,113.40
  6. Step 6: Final answer
    x = 325,415.78

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1.5x scale

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.