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Finding the Fourth Proportional to 213,328.60, 319,215.30 and 194,666.20

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Solution

The fourth proportional to 213,328.60, 319,215.30 and 194,666.20 is: 291,289.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,328.60 : 319,215.30 = 194,666.20 : x
  2. Step 2: Convert to fraction form
    213,328.60/319,215.30 = 194,666.20/x
  3. Step 3: Cross multiply
    213,328.60x = 319,215.30 × 194,666.20
  4. Step 4: Simplify right side
    213,328.60x = 62,140,429,432.86
  5. Step 5: Solve for x
    x = 62,140,429,432.86/213,328.60
  6. Step 6: Final answer
    x = 291,289.73

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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.