Home / 878,459.51-1,317,689.26-279,420.77

Finding the Fourth Proportional to 878,459.51, 1,317,689.26 and 279,420.77

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Solution

The fourth proportional to 878,459.51, 1,317,689.26 and 279,420.77 is: 419,131.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,459.51 : 1,317,689.26 = 279,420.77 : x
  2. Step 2: Convert to fraction form
    878,459.51/1,317,689.26 = 279,420.77/x
  3. Step 3: Cross multiply
    878,459.51x = 1,317,689.26 × 279,420.77
  4. Step 4: Simplify right side
    878,459.51x = 368,189,741,061.48
  5. Step 5: Solve for x
    x = 368,189,741,061.48/878,459.51
  6. Step 6: Final answer
    x = 419,131.15

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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.