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Finding the Fourth Proportional to 355,999.80, 533,999.70 and 187,289.40

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Solution

The fourth proportional to 355,999.80, 533,999.70 and 187,289.40 is: 280,934.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,999.80 : 533,999.70 = 187,289.40 : x
  2. Step 2: Convert to fraction form
    355,999.80/533,999.70 = 187,289.40/x
  3. Step 3: Cross multiply
    355,999.80x = 533,999.70 × 187,289.40
  4. Step 4: Simplify right side
    355,999.80x = 100,012,483,413.18
  5. Step 5: Solve for x
    x = 100,012,483,413.18/355,999.80
  6. Step 6: Final answer
    x = 280,934.10

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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.