Home / 4,870.40-7,305.60-3,120.80

Finding the Fourth Proportional to 4,870.40, 7,305.60 and 3,120.80

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Solution

The fourth proportional to 4,870.40, 7,305.60 and 3,120.80 is: 4,681.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,870.40 : 7,305.60 = 3,120.80 : x
  2. Step 2: Convert to fraction form
    4,870.40/7,305.60 = 3,120.80/x
  3. Step 3: Cross multiply
    4,870.40x = 7,305.60 × 3,120.80
  4. Step 4: Simplify right side
    4,870.40x = 22,799,316.48
  5. Step 5: Solve for x
    x = 22,799,316.48/4,870.40
  6. Step 6: Final answer
    x = 4,681.20

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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.