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Finding the Fourth Proportional to 630,639.40, 946,542.30 and 315,322.60

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Solution

The fourth proportional to 630,639.40, 946,542.30 and 315,322.60 is: 473,275.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,639.40 : 946,542.30 = 315,322.60 : x
  2. Step 2: Convert to fraction form
    630,639.40/946,542.30 = 315,322.60/x
  3. Step 3: Cross multiply
    630,639.40x = 946,542.30 × 315,322.60
  4. Step 4: Simplify right side
    630,639.40x = 298,466,179,045.98
  5. Step 5: Solve for x
    x = 298,466,179,045.98/630,639.40
  6. Step 6: Final answer
    x = 473,275.50

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.