Home / 878,485.04-1,212,322.80-515,916.56

Finding the Fourth Proportional to 878,485.04, 1,212,322.80 and 515,916.56

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Solution

The fourth proportional to 878,485.04, 1,212,322.80 and 515,916.56 is: 711,972.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,485.04 : 1,212,322.80 = 515,916.56 : x
  2. Step 2: Convert to fraction form
    878,485.04/1,212,322.80 = 515,916.56/x
  3. Step 3: Cross multiply
    878,485.04x = 1,212,322.80 × 515,916.56
  4. Step 4: Simplify right side
    878,485.04x = 625,457,408,585.57
  5. Step 5: Solve for x
    x = 625,457,408,585.57/878,485.04
  6. Step 6: Final answer
    x = 711,972.75

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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.