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Finding the Fourth Proportional to 807,831.40, 1,211,747.10 and 525,821.80

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Solution

The fourth proportional to 807,831.40, 1,211,747.10 and 525,821.80 is: 788,732.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    807,831.40 : 1,211,747.10 = 525,821.80 : x
  2. Step 2: Convert to fraction form
    807,831.40/1,211,747.10 = 525,821.80/x
  3. Step 3: Cross multiply
    807,831.40x = 1,211,747.10 × 525,821.80
  4. Step 4: Simplify right side
    807,831.40x = 637,163,041,266.78
  5. Step 5: Solve for x
    x = 637,163,041,266.78/807,831.40
  6. Step 6: Final answer
    x = 788,732.70

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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.