Home / 521,905.05-720,216.77-307,058.94

Finding the Fourth Proportional to 521,905.05, 720,216.77 and 307,058.94

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Solution

The fourth proportional to 521,905.05, 720,216.77 and 307,058.94 is: 423,734.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,905.05 : 720,216.77 = 307,058.94 : x
  2. Step 2: Convert to fraction form
    521,905.05/720,216.77 = 307,058.94/x
  3. Step 3: Cross multiply
    521,905.05x = 720,216.77 × 307,058.94
  4. Step 4: Simplify right side
    521,905.05x = 221,148,996,431.13
  5. Step 5: Solve for x
    x = 221,148,996,431.13/521,905.05
  6. Step 6: Final answer
    x = 423,734.16

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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.