Home / 1,420.07-2,130.08-432.88

Finding the Fourth Proportional to 1,420.07, 2,130.08 and 432.88

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Solution

The fourth proportional to 1,420.07, 2,130.08 and 432.88 is: 649.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,420.07 : 2,130.08 = 432.88 : x
  2. Step 2: Convert to fraction form
    1,420.07/2,130.08 = 432.88/x
  3. Step 3: Cross multiply
    1,420.07x = 2,130.08 × 432.88
  4. Step 4: Simplify right side
    1,420.07x = 922,061.54
  5. Step 5: Solve for x
    x = 922,061.54/1,420.07
  6. Step 6: Final answer
    x = 649.31

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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.