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Finding the Fourth Proportional to 491,621.76, 678,391.08 and 362,630.40

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Solution

The fourth proportional to 491,621.76, 678,391.08 and 362,630.40 is: 500,395.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,621.76 : 678,391.08 = 362,630.40 : x
  2. Step 2: Convert to fraction form
    491,621.76/678,391.08 = 362,630.40/x
  3. Step 3: Cross multiply
    491,621.76x = 678,391.08 × 362,630.40
  4. Step 4: Simplify right side
    491,621.76x = 246,005,228,696.83
  5. Step 5: Solve for x
    x = 246,005,228,696.83/491,621.76
  6. Step 6: Final answer
    x = 500,395.32

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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.