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Finding the Fourth Proportional to 640,315.06, 883,635.10 and 353,835.16

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Solution

The fourth proportional to 640,315.06, 883,635.10 and 353,835.16 is: 488,292.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,315.06 : 883,635.10 = 353,835.16 : x
  2. Step 2: Convert to fraction form
    640,315.06/883,635.10 = 353,835.16/x
  3. Step 3: Cross multiply
    640,315.06x = 883,635.10 × 353,835.16
  4. Step 4: Simplify right side
    640,315.06x = 312,661,166,990.12
  5. Step 5: Solve for x
    x = 312,661,166,990.12/640,315.06
  6. Step 6: Final answer
    x = 488,292.70

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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.