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Finding the Fourth Proportional to 420,108.40, 630,623.40 and 262,514.80

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Solution

The fourth proportional to 420,108.40, 630,623.40 and 262,514.80 is: 394,060.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,108.40 : 630,623.40 = 262,514.80 : x
  2. Step 2: Convert to fraction form
    420,108.40/630,623.40 = 262,514.80/x
  3. Step 3: Cross multiply
    420,108.40x = 630,623.40 × 262,514.80
  4. Step 4: Simplify right side
    420,108.40x = 165,547,975,726.32
  5. Step 5: Solve for x
    x = 165,547,975,726.32/420,108.40
  6. Step 6: Final answer
    x = 394,060.14

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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.