Home / 1,029.45-1,420.71-609.72

Finding the Fourth Proportional to 1,029.45, 1,420.71 and 609.72

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Solution

The fourth proportional to 1,029.45, 1,420.71 and 609.72 is: 841.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,029.45 : 1,420.71 = 609.72 : x
  2. Step 2: Convert to fraction form
    1,029.45/1,420.71 = 609.72/x
  3. Step 3: Cross multiply
    1,029.45x = 1,420.71 × 609.72
  4. Step 4: Simplify right side
    1,029.45x = 866,235.30
  5. Step 5: Solve for x
    x = 866,235.30/1,029.45
  6. Step 6: Final answer
    x = 841.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.