Home / 1,416.45-2,124.50-429.29

Finding the Fourth Proportional to 1,416.45, 2,124.50 and 429.29

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Solution

The fourth proportional to 1,416.45, 2,124.50 and 429.29 is: 643.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,416.45 : 2,124.50 = 429.29 : x
  2. Step 2: Convert to fraction form
    1,416.45/2,124.50 = 429.29/x
  3. Step 3: Cross multiply
    1,416.45x = 2,124.50 × 429.29
  4. Step 4: Simplify right side
    1,416.45x = 912,013.84
  5. Step 5: Solve for x
    x = 912,013.84/1,416.45
  6. Step 6: Final answer
    x = 643.87

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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.