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Finding the Fourth Proportional to 559,009.62, 771,416.41 and 310,650.72

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Solution

The fourth proportional to 559,009.62, 771,416.41 and 310,650.72 is: 428,688.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,009.62 : 771,416.41 = 310,650.72 : x
  2. Step 2: Convert to fraction form
    559,009.62/771,416.41 = 310,650.72/x
  3. Step 3: Cross multiply
    559,009.62x = 771,416.41 × 310,650.72
  4. Step 4: Simplify right side
    559,009.62x = 239,641,063,186.32
  5. Step 5: Solve for x
    x = 239,641,063,186.32/559,009.62
  6. Step 6: Final answer
    x = 428,688.62

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.