Home / 3,130.37-4,318.80-1,870.55

Finding the Fourth Proportional to 3,130.37, 4,318.80 and 1,870.55

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Solution

The fourth proportional to 3,130.37, 4,318.80 and 1,870.55 is: 2,580.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,130.37 : 4,318.80 = 1,870.55 : x
  2. Step 2: Convert to fraction form
    3,130.37/4,318.80 = 1,870.55/x
  3. Step 3: Cross multiply
    3,130.37x = 4,318.80 × 1,870.55
  4. Step 4: Simplify right side
    3,130.37x = 8,078,531.34
  5. Step 5: Solve for x
    x = 8,078,531.34/3,130.37
  6. Step 6: Final answer
    x = 2,580.70

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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.