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Finding the Fourth Proportional to 328,901.60, 493,352.40 and 315,999.20

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Solution

The fourth proportional to 328,901.60, 493,352.40 and 315,999.20 is: 473,998.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,901.60 : 493,352.40 = 315,999.20 : x
  2. Step 2: Convert to fraction form
    328,901.60/493,352.40 = 315,999.20/x
  3. Step 3: Cross multiply
    328,901.60x = 493,352.40 × 315,999.20
  4. Step 4: Simplify right side
    328,901.60x = 155,898,963,718.08
  5. Step 5: Solve for x
    x = 155,898,963,718.08/328,901.60
  6. Step 6: Final answer
    x = 473,998.80

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Similar ratio
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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.