Home / 2,990.02-4,123.40-2,280.62

Finding the Fourth Proportional to 2,990.02, 4,123.40 and 2,280.62

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Solution

The fourth proportional to 2,990.02, 4,123.40 and 2,280.62 is: 3,145.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,990.02 : 4,123.40 = 2,280.62 : x
  2. Step 2: Convert to fraction form
    2,990.02/4,123.40 = 2,280.62/x
  3. Step 3: Cross multiply
    2,990.02x = 4,123.40 × 2,280.62
  4. Step 4: Simplify right side
    2,990.02x = 9,403,908.51
  5. Step 5: Solve for x
    x = 9,403,908.51/2,990.02
  6. Step 6: Final answer
    x = 3,145.10

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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.