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Finding the Fourth Proportional to 640,384.74, 883,751.26 and 349,989.93

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Solution

The fourth proportional to 640,384.74, 883,751.26 and 349,989.93 is: 482,997.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,384.74 : 883,751.26 = 349,989.93 : x
  2. Step 2: Convert to fraction form
    640,384.74/883,751.26 = 349,989.93/x
  3. Step 3: Cross multiply
    640,384.74x = 883,751.26 × 349,989.93
  4. Step 4: Simplify right side
    640,384.74x = 309,304,041,624.81
  5. Step 5: Solve for x
    x = 309,304,041,624.81/640,384.74
  6. Step 6: Final answer
    x = 482,997.21

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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.