Home / 878,039.04-1,316,920.64-278,921.28

Finding the Fourth Proportional to 878,039.04, 1,316,920.64 and 278,921.28

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Solution

The fourth proportional to 878,039.04, 1,316,920.64 and 278,921.28 is: 418,338.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,039.04 : 1,316,920.64 = 278,921.28 : x
  2. Step 2: Convert to fraction form
    878,039.04/1,316,920.64 = 278,921.28/x
  3. Step 3: Cross multiply
    878,039.04x = 1,316,920.64 × 278,921.28
  4. Step 4: Simplify right side
    878,039.04x = 367,317,190,567.22
  5. Step 5: Solve for x
    x = 367,317,190,567.22/878,039.04
  6. Step 6: Final answer
    x = 418,338.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.