Home / 399,413.13-551,194.51-218,130.40

Finding the Fourth Proportional to 399,413.13, 551,194.51 and 218,130.40

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Solution

The fourth proportional to 399,413.13, 551,194.51 and 218,130.40 is: 301,022.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,413.13 : 551,194.51 = 218,130.40 : x
  2. Step 2: Convert to fraction form
    399,413.13/551,194.51 = 218,130.40/x
  3. Step 3: Cross multiply
    399,413.13x = 551,194.51 × 218,130.40
  4. Step 4: Simplify right side
    399,413.13x = 120,232,278,944.10
  5. Step 5: Solve for x
    x = 120,232,278,944.10/399,413.13
  6. Step 6: Final answer
    x = 301,022.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.