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Finding the Fourth Proportional to 420,923.60, 630,156.60 and 376,686.80

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Solution

The fourth proportional to 420,923.60, 630,156.60 and 376,686.80 is: 563,930.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,923.60 : 630,156.60 = 376,686.80 : x
  2. Step 2: Convert to fraction form
    420,923.60/630,156.60 = 376,686.80/x
  3. Step 3: Cross multiply
    420,923.60x = 630,156.60 × 376,686.80
  4. Step 4: Simplify right side
    420,923.60x = 237,371,673,152.88
  5. Step 5: Solve for x
    x = 237,371,673,152.88/420,923.60
  6. Step 6: Final answer
    x = 563,930.54

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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.