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Finding the Fourth Proportional to 328,719.80, 493,079.70 and 210,621.80

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Solution

The fourth proportional to 328,719.80, 493,079.70 and 210,621.80 is: 315,932.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,719.80 : 493,079.70 = 210,621.80 : x
  2. Step 2: Convert to fraction form
    328,719.80/493,079.70 = 210,621.80/x
  3. Step 3: Cross multiply
    328,719.80x = 493,079.70 × 210,621.80
  4. Step 4: Simplify right side
    328,719.80x = 103,853,333,957.46
  5. Step 5: Solve for x
    x = 103,853,333,957.46/328,719.80
  6. Step 6: Final answer
    x = 315,932.70

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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.