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Finding the Fourth Proportional to 353,307.64, 529,640.72 and 128,509.15

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Solution

The fourth proportional to 353,307.64, 529,640.72 and 128,509.15 is: 192,647.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    353,307.64 : 529,640.72 = 128,509.15 : x
  2. Step 2: Convert to fraction form
    353,307.64/529,640.72 = 128,509.15/x
  3. Step 3: Cross multiply
    353,307.64x = 529,640.72 × 128,509.15
  4. Step 4: Simplify right side
    353,307.64x = 68,063,678,963.79
  5. Step 5: Solve for x
    x = 68,063,678,963.79/353,307.64
  6. Step 6: Final answer
    x = 192,647.06

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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.