Home / 315,518.32-435,413.10-172,278.28

Finding the Fourth Proportional to 315,518.32, 435,413.10 and 172,278.28

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Solution

The fourth proportional to 315,518.32, 435,413.10 and 172,278.28 is: 237,742.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,518.32 : 435,413.10 = 172,278.28 : x
  2. Step 2: Convert to fraction form
    315,518.32/435,413.10 = 172,278.28/x
  3. Step 3: Cross multiply
    315,518.32x = 435,413.10 × 172,278.28
  4. Step 4: Simplify right side
    315,518.32x = 75,012,219,957.47
  5. Step 5: Solve for x
    x = 75,012,219,957.47/315,518.32
  6. Step 6: Final answer
    x = 237,742.84

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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.