Home / 1,420.85-2,130.40-598.70

Finding the Fourth Proportional to 1,420.85, 2,130.40 and 598.70

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Solution

The fourth proportional to 1,420.85, 2,130.40 and 598.70 is: 897.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420.85 : 2,130.40 = 598.70 : x
  2. Step 2: Convert to fraction form
    1,420.85/2,130.40 = 598.70/x
  3. Step 3: Cross multiply
    1,420.85x = 2,130.40 × 598.70
  4. Step 4: Simplify right side
    1,420.85x = 1,275,470.48
  5. Step 5: Solve for x
    x = 1,275,470.48/1,420.85
  6. Step 6: Final answer
    x = 897.68

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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.