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Finding the Fourth Proportional to 882,640.64, 1,217,982.48 and 500,728.88

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Solution

The fourth proportional to 882,640.64, 1,217,982.48 and 500,728.88 is: 690,970.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    882,640.64 : 1,217,982.48 = 500,728.88 : x
  2. Step 2: Convert to fraction form
    882,640.64/1,217,982.48 = 500,728.88/x
  3. Step 3: Cross multiply
    882,640.64x = 1,217,982.48 × 500,728.88
  4. Step 4: Simplify right side
    882,640.64x = 609,879,003,070.02
  5. Step 5: Solve for x
    x = 609,879,003,070.02/882,640.64
  6. Step 6: Final answer
    x = 690,970.91

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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.