Home / 521,811.48-720,445.26-400,735.51

Finding the Fourth Proportional to 521,811.48, 720,445.26 and 400,735.51

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Solution

The fourth proportional to 521,811.48, 720,445.26 and 400,735.51 is: 553,280.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,811.48 : 720,445.26 = 400,735.51 : x
  2. Step 2: Convert to fraction form
    521,811.48/720,445.26 = 400,735.51/x
  3. Step 3: Cross multiply
    521,811.48x = 720,445.26 × 400,735.51
  4. Step 4: Simplify right side
    521,811.48x = 288,707,998,693.18
  5. Step 5: Solve for x
    x = 288,707,998,693.18/521,811.48
  6. Step 6: Final answer
    x = 553,280.27

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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.