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Finding the Fourth Proportional to 640,044.56, 883,369.32 and 371,928.08

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Solution

The fourth proportional to 640,044.56, 883,369.32 and 371,928.08 is: 513,323.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,044.56 : 883,369.32 = 371,928.08 : x
  2. Step 2: Convert to fraction form
    640,044.56/883,369.32 = 371,928.08/x
  3. Step 3: Cross multiply
    640,044.56x = 883,369.32 × 371,928.08
  4. Step 4: Simplify right side
    640,044.56x = 328,549,855,118.51
  5. Step 5: Solve for x
    x = 328,549,855,118.51/640,044.56
  6. Step 6: Final answer
    x = 513,323.41

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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.