Home / 640,827.37-884,725.50-399,436.91

Finding the Fourth Proportional to 640,827.37, 884,725.50 and 399,436.91

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Solution

The fourth proportional to 640,827.37, 884,725.50 and 399,436.91 is: 551,462.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,827.37 : 884,725.50 = 399,436.91 : x
  2. Step 2: Convert to fraction form
    640,827.37/884,725.50 = 399,436.91/x
  3. Step 3: Cross multiply
    640,827.37x = 884,725.50 × 399,436.91
  4. Step 4: Simplify right side
    640,827.37x = 353,392,020,310.19
  5. Step 5: Solve for x
    x = 353,392,020,310.19/640,827.37
  6. Step 6: Final answer
    x = 551,462.12

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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.