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Finding the Fourth Proportional to 209,800.80, 315,478.80 and 175,586.40

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Solution

The fourth proportional to 209,800.80, 315,478.80 and 175,586.40 is: 264,030.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,800.80 : 315,478.80 = 175,586.40 : x
  2. Step 2: Convert to fraction form
    209,800.80/315,478.80 = 175,586.40/x
  3. Step 3: Cross multiply
    209,800.80x = 315,478.80 × 175,586.40
  4. Step 4: Simplify right side
    209,800.80x = 55,393,786,768.32
  5. Step 5: Solve for x
    x = 55,393,786,768.32/209,800.80
  6. Step 6: Final answer
    x = 264,030.39

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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.