Home / 1,490.20-2,056.08-900.62

Finding the Fourth Proportional to 1,490.20, 2,056.08 and 900.62

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Solution

The fourth proportional to 1,490.20, 2,056.08 and 900.62 is: 1,242.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,490.20 : 2,056.08 = 900.62 : x
  2. Step 2: Convert to fraction form
    1,490.20/2,056.08 = 900.62/x
  3. Step 3: Cross multiply
    1,490.20x = 2,056.08 × 900.62
  4. Step 4: Simplify right side
    1,490.20x = 1,851,747.58
  5. Step 5: Solve for x
    x = 1,851,747.58/1,490.20
  6. Step 6: Final answer
    x = 1,242.62

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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.