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Finding the Fourth Proportional to 886,915.80, 1,330,373.70 and 381,718.80

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Solution

The fourth proportional to 886,915.80, 1,330,373.70 and 381,718.80 is: 572,578.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    886,915.80 : 1,330,373.70 = 381,718.80 : x
  2. Step 2: Convert to fraction form
    886,915.80/1,330,373.70 = 381,718.80/x
  3. Step 3: Cross multiply
    886,915.80x = 1,330,373.70 × 381,718.80
  4. Step 4: Simplify right side
    886,915.80x = 507,828,652,315.56
  5. Step 5: Solve for x
    x = 507,828,652,315.56/886,915.80
  6. Step 6: Final answer
    x = 572,578.20

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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.