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Finding the Fourth Proportional to 368,889.60, 553,334.40 and 256,915.20

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Solution

The fourth proportional to 368,889.60, 553,334.40 and 256,915.20 is: 385,372.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,889.60 : 553,334.40 = 256,915.20 : x
  2. Step 2: Convert to fraction form
    368,889.60/553,334.40 = 256,915.20/x
  3. Step 3: Cross multiply
    368,889.60x = 553,334.40 × 256,915.20
  4. Step 4: Simplify right side
    368,889.60x = 142,160,018,042.88
  5. Step 5: Solve for x
    x = 142,160,018,042.88/368,889.60
  6. Step 6: Final answer
    x = 385,372.80

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1.5x scale

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.