Home / 429,138.09-644,130.87-322,150.05

Finding the Fourth Proportional to 429,138.09, 644,130.87 and 322,150.05

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Solution

The fourth proportional to 429,138.09, 644,130.87 and 322,150.05 is: 483,543.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,138.09 : 644,130.87 = 322,150.05 : x
  2. Step 2: Convert to fraction form
    429,138.09/644,130.87 = 322,150.05/x
  3. Step 3: Cross multiply
    429,138.09x = 644,130.87 × 322,150.05
  4. Step 4: Simplify right side
    429,138.09x = 207,506,791,977.04
  5. Step 5: Solve for x
    x = 207,506,791,977.04/429,138.09
  6. Step 6: Final answer
    x = 483,543.17

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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.