Home / 640,509.76-883,949.36-354,023.76

Finding the Fourth Proportional to 640,509.76, 883,949.36 and 354,023.76

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Solution

The fourth proportional to 640,509.76, 883,949.36 and 354,023.76 is: 488,578.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,509.76 : 883,949.36 = 354,023.76 : x
  2. Step 2: Convert to fraction form
    640,509.76/883,949.36 = 354,023.76/x
  3. Step 3: Cross multiply
    640,509.76x = 883,949.36 × 354,023.76
  4. Step 4: Simplify right side
    640,509.76x = 312,939,076,076.79
  5. Step 5: Solve for x
    x = 312,939,076,076.79/640,509.76
  6. Step 6: Final answer
    x = 488,578.15

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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.