Home / 878,489.04-1,212,328.32-515,920.56

Finding the Fourth Proportional to 878,489.04, 1,212,328.32 and 515,920.56

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Solution

The fourth proportional to 878,489.04, 1,212,328.32 and 515,920.56 is: 711,978.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,489.04 : 1,212,328.32 = 515,920.56 : x
  2. Step 2: Convert to fraction form
    878,489.04/1,212,328.32 = 515,920.56/x
  3. Step 3: Cross multiply
    878,489.04x = 1,212,328.32 × 515,920.56
  4. Step 4: Simplify right side
    878,489.04x = 625,465,105,758.26
  5. Step 5: Solve for x
    x = 625,465,105,758.26/878,489.04
  6. Step 6: Final answer
    x = 711,978.27

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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.