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Finding the Fourth Proportional to 370,413.20, 555,619.80 and 121,120.40

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Solution

The fourth proportional to 370,413.20, 555,619.80 and 121,120.40 is: 181,680.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    370,413.20 : 555,619.80 = 121,120.40 : x
  2. Step 2: Convert to fraction form
    370,413.20/555,619.80 = 121,120.40/x
  3. Step 3: Cross multiply
    370,413.20x = 555,619.80 × 121,120.40
  4. Step 4: Simplify right side
    370,413.20x = 67,296,892,423.92
  5. Step 5: Solve for x
    x = 67,296,892,423.92/370,413.20
  6. Step 6: Final answer
    x = 181,680.60

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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.