Home / 1,420.16-2,130.26-432.99

Finding the Fourth Proportional to 1,420.16, 2,130.26 and 432.99

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Solution

The fourth proportional to 1,420.16, 2,130.26 and 432.99 is: 649.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420.16 : 2,130.26 = 432.99 : x
  2. Step 2: Convert to fraction form
    1,420.16/2,130.26 = 432.99/x
  3. Step 3: Cross multiply
    1,420.16x = 2,130.26 × 432.99
  4. Step 4: Simplify right side
    1,420.16x = 922,379.11
  5. Step 5: Solve for x
    x = 922,379.11/1,420.16
  6. Step 6: Final answer
    x = 649.49

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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.