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Finding the Fourth Proportional to 962,686.64, 1,328,730.84 and 640,410.32

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Solution

The fourth proportional to 962,686.64, 1,328,730.84 and 640,410.32 is: 883,914.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    962,686.64 : 1,328,730.84 = 640,410.32 : x
  2. Step 2: Convert to fraction form
    962,686.64/1,328,730.84 = 640,410.32/x
  3. Step 3: Cross multiply
    962,686.64x = 1,328,730.84 × 640,410.32
  4. Step 4: Simplify right side
    962,686.64x = 850,932,942,438.27
  5. Step 5: Solve for x
    x = 850,932,942,438.27/962,686.64
  6. Step 6: Final answer
    x = 883,914.77

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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.