Home / 1,319.04-1,820.64-877.20

Finding the Fourth Proportional to 1,319.04, 1,820.64 and 877.20

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Solution

The fourth proportional to 1,319.04, 1,820.64 and 877.20 is: 1,210.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319.04 : 1,820.64 = 877.20 : x
  2. Step 2: Convert to fraction form
    1,319.04/1,820.64 = 877.20/x
  3. Step 3: Cross multiply
    1,319.04x = 1,820.64 × 877.20
  4. Step 4: Simplify right side
    1,319.04x = 1,597,065.41
  5. Step 5: Solve for x
    x = 1,597,065.41/1,319.04
  6. Step 6: Final answer
    x = 1,210.78

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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.