Home / 1,420.30-2,130.26-554.50

Finding the Fourth Proportional to 1,420.30, 2,130.26 and 554.50

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Solution

The fourth proportional to 1,420.30, 2,130.26 and 554.50 is: 831.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420.30 : 2,130.26 = 554.50 : x
  2. Step 2: Convert to fraction form
    1,420.30/2,130.26 = 554.50/x
  3. Step 3: Cross multiply
    1,420.30x = 2,130.26 × 554.50
  4. Step 4: Simplify right side
    1,420.30x = 1,181,229.17
  5. Step 5: Solve for x
    x = 1,181,229.17/1,420.30
  6. Step 6: Final answer
    x = 831.68

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Double scale
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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.