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Finding the Fourth Proportional to 640,680.68, 884,140.94 and 350,311

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Solution

The fourth proportional to 640,680.68, 884,140.94 and 350,311 is: 483,430.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,680.68 : 884,140.94 = 350,311 : x
  2. Step 2: Convert to fraction form
    640,680.68/884,140.94 = 350,311/x
  3. Step 3: Cross multiply
    640,680.68x = 884,140.94 × 350,311
  4. Step 4: Simplify right side
    640,680.68x = 309,724,296,832.34
  5. Step 5: Solve for x
    x = 309,724,296,832.34/640,680.68
  6. Step 6: Final answer
    x = 483,430.06

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1.5x scale

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.