Home / 1,430.36-2,130.16-1,381.76

Finding the Fourth Proportional to 1,430.36, 2,130.16 and 1,381.76

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Solution

The fourth proportional to 1,430.36, 2,130.16 and 1,381.76 is: 2,057.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,430.36 : 2,130.16 = 1,381.76 : x
  2. Step 2: Convert to fraction form
    1,430.36/2,130.16 = 1,381.76/x
  3. Step 3: Cross multiply
    1,430.36x = 2,130.16 × 1,381.76
  4. Step 4: Simplify right side
    1,430.36x = 2,943,369.88
  5. Step 5: Solve for x
    x = 2,943,369.88/1,430.36
  6. Step 6: Final answer
    x = 2,057.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.