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Finding the Fourth Proportional to 640,360.47, 883,698.30 and 353,880.63

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Solution

The fourth proportional to 640,360.47, 883,698.30 and 353,880.63 is: 488,355.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,360.47 : 883,698.30 = 353,880.63 : x
  2. Step 2: Convert to fraction form
    640,360.47/883,698.30 = 353,880.63/x
  3. Step 3: Cross multiply
    640,360.47x = 883,698.30 × 353,880.63
  4. Step 4: Simplify right side
    640,360.47x = 312,723,711,133.93
  5. Step 5: Solve for x
    x = 312,723,711,133.93/640,360.47
  6. Step 6: Final answer
    x = 488,355.74

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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.