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Finding the Fourth Proportional to 420,973.80, 630,923.10 and 171,373.80

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Solution

The fourth proportional to 420,973.80, 630,923.10 and 171,373.80 is: 256,841.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,973.80 : 630,923.10 = 171,373.80 : x
  2. Step 2: Convert to fraction form
    420,973.80/630,923.10 = 171,373.80/x
  3. Step 3: Cross multiply
    420,973.80x = 630,923.10 × 171,373.80
  4. Step 4: Simplify right side
    420,973.80x = 108,123,689,154.78
  5. Step 5: Solve for x
    x = 108,123,689,154.78/420,973.80
  6. Step 6: Final answer
    x = 256,841.85

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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.