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Finding the Fourth Proportional to 909,915.20, 1,364,872.80 and 898,105.40

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Solution

The fourth proportional to 909,915.20, 1,364,872.80 and 898,105.40 is: 1,347,158.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    909,915.20 : 1,364,872.80 = 898,105.40 : x
  2. Step 2: Convert to fraction form
    909,915.20/1,364,872.80 = 898,105.40/x
  3. Step 3: Cross multiply
    909,915.20x = 1,364,872.80 × 898,105.40
  4. Step 4: Simplify right side
    909,915.20x = 1,225,799,631,993.12
  5. Step 5: Solve for x
    x = 1,225,799,631,993.12/909,915.20
  6. Step 6: Final answer
    x = 1,347,158.10

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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.