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Finding the Fourth Proportional to 445,413.60, 668,201.40 and 145,810.80

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Solution

The fourth proportional to 445,413.60, 668,201.40 and 145,810.80 is: 218,742.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    445,413.60 : 668,201.40 = 145,810.80 : x
  2. Step 2: Convert to fraction form
    445,413.60/668,201.40 = 145,810.80/x
  3. Step 3: Cross multiply
    445,413.60x = 668,201.40 × 145,810.80
  4. Step 4: Simplify right side
    445,413.60x = 97,430,980,695.12
  5. Step 5: Solve for x
    x = 97,430,980,695.12/445,413.60
  6. Step 6: Final answer
    x = 218,742.72

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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.