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Finding the Fourth Proportional to 521,910.98, 720,224.88 and 307,064.90

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Solution

The fourth proportional to 521,910.98, 720,224.88 and 307,064.90 is: 423,742.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,910.98 : 720,224.88 = 307,064.90 : x
  2. Step 2: Convert to fraction form
    521,910.98/720,224.88 = 307,064.90/x
  3. Step 3: Cross multiply
    521,910.98x = 720,224.88 × 307,064.90
  4. Step 4: Simplify right side
    521,910.98x = 221,155,780,754.71
  5. Step 5: Solve for x
    x = 221,155,780,754.71/521,910.98
  6. Step 6: Final answer
    x = 423,742.34

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1.5x scale

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.