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Finding the Fourth Proportional to 640,367.77, 883,683.64 and 368,477.70

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Solution

The fourth proportional to 640,367.77, 883,683.64 and 368,477.70 is: 508,485.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,367.77 : 883,683.64 = 368,477.70 : x
  2. Step 2: Convert to fraction form
    640,367.77/883,683.64 = 368,477.70/x
  3. Step 3: Cross multiply
    640,367.77x = 883,683.64 × 368,477.70
  4. Step 4: Simplify right side
    640,367.77x = 325,617,708,934.02
  5. Step 5: Solve for x
    x = 325,617,708,934.02/640,367.77
  6. Step 6: Final answer
    x = 508,485.48

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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.