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Finding the Fourth Proportional to 640,394.96, 883,747.80 and 350,012.40

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Solution

The fourth proportional to 640,394.96, 883,747.80 and 350,012.40 is: 483,018.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,394.96 : 883,747.80 = 350,012.40 : x
  2. Step 2: Convert to fraction form
    640,394.96/883,747.80 = 350,012.40/x
  3. Step 3: Cross multiply
    640,394.96x = 883,747.80 × 350,012.40
  4. Step 4: Simplify right side
    640,394.96x = 309,322,688,472.72
  5. Step 5: Solve for x
    x = 309,322,688,472.72/640,394.96
  6. Step 6: Final answer
    x = 483,018.62

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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.