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Finding the Fourth Proportional to 328,779.60, 493,169.40 and 209,806.80

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Solution

The fourth proportional to 328,779.60, 493,169.40 and 209,806.80 is: 314,710.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,779.60 : 493,169.40 = 209,806.80 : x
  2. Step 2: Convert to fraction form
    328,779.60/493,169.40 = 209,806.80/x
  3. Step 3: Cross multiply
    328,779.60x = 493,169.40 × 209,806.80
  4. Step 4: Simplify right side
    328,779.60x = 103,470,293,671.92
  5. Step 5: Solve for x
    x = 103,470,293,671.92/328,779.60
  6. Step 6: Final answer
    x = 314,710.20

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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.