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Finding the Fourth Proportional to 212,718.40, 319,552.80 and 177,726.40

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Solution

The fourth proportional to 212,718.40, 319,552.80 and 177,726.40 is: 266,986.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,718.40 : 319,552.80 = 177,726.40 : x
  2. Step 2: Convert to fraction form
    212,718.40/319,552.80 = 177,726.40/x
  3. Step 3: Cross multiply
    212,718.40x = 319,552.80 × 177,726.40
  4. Step 4: Simplify right side
    212,718.40x = 56,792,968,753.92
  5. Step 5: Solve for x
    x = 56,792,968,753.92/212,718.40
  6. Step 6: Final answer
    x = 266,986.63

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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.