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Finding the Fourth Proportional to 252,031.80, 378,047.70 and 163,385.40

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Solution

The fourth proportional to 252,031.80, 378,047.70 and 163,385.40 is: 245,078.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    252,031.80 : 378,047.70 = 163,385.40 : x
  2. Step 2: Convert to fraction form
    252,031.80/378,047.70 = 163,385.40/x
  3. Step 3: Cross multiply
    252,031.80x = 378,047.70 × 163,385.40
  4. Step 4: Simplify right side
    252,031.80x = 61,767,474,683.58
  5. Step 5: Solve for x
    x = 61,767,474,683.58/252,031.80
  6. Step 6: Final answer
    x = 245,078.10

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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.