Home / 521,921.25-720,598.29-400,846.20

Finding the Fourth Proportional to 521,921.25, 720,598.29 and 400,846.20

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Solution

The fourth proportional to 521,921.25, 720,598.29 and 400,846.20 is: 553,434.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,921.25 : 720,598.29 = 400,846.20 : x
  2. Step 2: Convert to fraction form
    521,921.25/720,598.29 = 400,846.20/x
  3. Step 3: Cross multiply
    521,921.25x = 720,598.29 × 400,846.20
  4. Step 4: Simplify right side
    521,921.25x = 288,849,086,273.00
  5. Step 5: Solve for x
    x = 288,849,086,273.00/521,921.25
  6. Step 6: Final answer
    x = 553,434.23

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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.