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Finding the Fourth Proportional to 388,312.64, 582,307.44 and 135,539.12

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Solution

The fourth proportional to 388,312.64, 582,307.44 and 135,539.12 is: 203,252.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,312.64 : 582,307.44 = 135,539.12 : x
  2. Step 2: Convert to fraction form
    388,312.64/582,307.44 = 135,539.12/x
  3. Step 3: Cross multiply
    388,312.64x = 582,307.44 × 135,539.12
  4. Step 4: Simplify right side
    388,312.64x = 78,925,437,987.05
  5. Step 5: Solve for x
    x = 78,925,437,987.05/388,312.64
  6. Step 6: Final answer
    x = 203,252.30

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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.