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Finding the Fourth Proportional to 420,002.70, 579,603.24 and 247,920.90

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Solution

The fourth proportional to 420,002.70, 579,603.24 and 247,920.90 is: 342,130.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,002.70 : 579,603.24 = 247,920.90 : x
  2. Step 2: Convert to fraction form
    420,002.70/579,603.24 = 247,920.90/x
  3. Step 3: Cross multiply
    420,002.70x = 579,603.24 × 247,920.90
  4. Step 4: Simplify right side
    420,002.70x = 143,695,756,903.72
  5. Step 5: Solve for x
    x = 143,695,756,903.72/420,002.70
  6. Step 6: Final answer
    x = 342,130.56

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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.