Home / 426,390.60-639,413.10-145,763.40

Finding the Fourth Proportional to 426,390.60, 639,413.10 and 145,763.40

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Solution

The fourth proportional to 426,390.60, 639,413.10 and 145,763.40 is: 218,586.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,390.60 : 639,413.10 = 145,763.40 : x
  2. Step 2: Convert to fraction form
    426,390.60/639,413.10 = 145,763.40/x
  3. Step 3: Cross multiply
    426,390.60x = 639,413.10 × 145,763.40
  4. Step 4: Simplify right side
    426,390.60x = 93,203,027,460.54
  5. Step 5: Solve for x
    x = 93,203,027,460.54/426,390.60
  6. Step 6: Final answer
    x = 218,586.03

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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.