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Finding the Fourth Proportional to 328,200.40, 492,300.60 and 210,005.20

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Solution

The fourth proportional to 328,200.40, 492,300.60 and 210,005.20 is: 315,007.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,200.40 : 492,300.60 = 210,005.20 : x
  2. Step 2: Convert to fraction form
    328,200.40/492,300.60 = 210,005.20/x
  3. Step 3: Cross multiply
    328,200.40x = 492,300.60 × 210,005.20
  4. Step 4: Simplify right side
    328,200.40x = 103,385,685,963.12
  5. Step 5: Solve for x
    x = 103,385,685,963.12/328,200.40
  6. Step 6: Final answer
    x = 315,007.80

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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.