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Finding the Fourth Proportional to 420,545.88, 630,172.86 and 285,434.39

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Solution

The fourth proportional to 420,545.88, 630,172.86 and 285,434.39 is: 427,713.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,545.88 : 630,172.86 = 285,434.39 : x
  2. Step 2: Convert to fraction form
    420,545.88/630,172.86 = 285,434.39/x
  3. Step 3: Cross multiply
    420,545.88x = 630,172.86 × 285,434.39
  4. Step 4: Simplify right side
    420,545.88x = 179,873,002,737.79
  5. Step 5: Solve for x
    x = 179,873,002,737.79/420,545.88
  6. Step 6: Final answer
    x = 427,713.15

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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.