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Finding the Fourth Proportional to 342,601.20, 513,901.80 and 120,985.20

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Solution

The fourth proportional to 342,601.20, 513,901.80 and 120,985.20 is: 181,477.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,601.20 : 513,901.80 = 120,985.20 : x
  2. Step 2: Convert to fraction form
    342,601.20/513,901.80 = 120,985.20/x
  3. Step 3: Cross multiply
    342,601.20x = 513,901.80 × 120,985.20
  4. Step 4: Simplify right side
    342,601.20x = 62,174,512,053.36
  5. Step 5: Solve for x
    x = 62,174,512,053.36/342,601.20
  6. Step 6: Final answer
    x = 181,477.80

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1.5x scale

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.