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Finding the Fourth Proportional to 342,211.80, 513,317.70 and 142,465.80

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Solution

The fourth proportional to 342,211.80, 513,317.70 and 142,465.80 is: 213,698.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    342,211.80 : 513,317.70 = 142,465.80 : x
  2. Step 2: Convert to fraction form
    342,211.80/513,317.70 = 142,465.80/x
  3. Step 3: Cross multiply
    342,211.80x = 513,317.70 × 142,465.80
  4. Step 4: Simplify right side
    342,211.80x = 73,130,216,784.66
  5. Step 5: Solve for x
    x = 73,130,216,784.66/342,211.80
  6. Step 6: Final answer
    x = 213,698.70

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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.