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Finding the Fourth Proportional to 877.32, 1,210.69 and 484.37

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Solution

The fourth proportional to 877.32, 1,210.69 and 484.37 is: 668.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    877.32 : 1,210.69 = 484.37 : x
  2. Step 2: Convert to fraction form
    877.32/1,210.69 = 484.37/x
  3. Step 3: Cross multiply
    877.32x = 1,210.69 × 484.37
  4. Step 4: Simplify right side
    877.32x = 586,421.92
  5. Step 5: Solve for x
    x = 586,421.92/877.32
  6. Step 6: Final answer
    x = 668.42

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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.