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Finding the Fourth Proportional to 478,915.35, 718,652.61 and 265,862.67

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Solution

The fourth proportional to 478,915.35, 718,652.61 and 265,862.67 is: 398,949.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,915.35 : 718,652.61 = 265,862.67 : x
  2. Step 2: Convert to fraction form
    478,915.35/718,652.61 = 265,862.67/x
  3. Step 3: Cross multiply
    478,915.35x = 718,652.61 × 265,862.67
  4. Step 4: Simplify right side
    478,915.35x = 191,062,901,697.07
  5. Step 5: Solve for x
    x = 191,062,901,697.07/478,915.35
  6. Step 6: Final answer
    x = 398,949.21

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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.