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Finding the Fourth Proportional to 270,018, 372,621 and 156,904.40

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Solution

The fourth proportional to 270,018, 372,621 and 156,904.40 is: 216,525.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    270,018 : 372,621 = 156,904.40 : x
  2. Step 2: Convert to fraction form
    270,018/372,621 = 156,904.40/x
  3. Step 3: Cross multiply
    270,018x = 372,621 × 156,904.40
  4. Step 4: Simplify right side
    270,018x = 58,465,874,432.40
  5. Step 5: Solve for x
    x = 58,465,874,432.40/270,018
  6. Step 6: Final answer
    x = 216,525.84

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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.