Home / 421,413.13-631,987.94-140,864.77

Finding the Fourth Proportional to 421,413.13, 631,987.94 and 140,864.77

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Solution

The fourth proportional to 421,413.13, 631,987.94 and 140,864.77 is: 211,253.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,413.13 : 631,987.94 = 140,864.77 : x
  2. Step 2: Convert to fraction form
    421,413.13/631,987.94 = 140,864.77/x
  3. Step 3: Cross multiply
    421,413.13x = 631,987.94 × 140,864.77
  4. Step 4: Simplify right side
    421,413.13x = 89,024,835,106.55
  5. Step 5: Solve for x
    x = 89,024,835,106.55/421,413.13
  6. Step 6: Final answer
    x = 211,253.11

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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.