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Finding the Fourth Proportional to 811,700.16, 1,119,892.32 and 489,508.80

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Solution

The fourth proportional to 811,700.16, 1,119,892.32 and 489,508.80 is: 675,369.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    811,700.16 : 1,119,892.32 = 489,508.80 : x
  2. Step 2: Convert to fraction form
    811,700.16/1,119,892.32 = 489,508.80/x
  3. Step 3: Cross multiply
    811,700.16x = 1,119,892.32 × 489,508.80
  4. Step 4: Simplify right side
    811,700.16x = 548,197,145,692.42
  5. Step 5: Solve for x
    x = 548,197,145,692.42/811,700.16
  6. Step 6: Final answer
    x = 675,369.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.