Home / 429,935.32-639,490.19-428,496.76

Finding the Fourth Proportional to 429,935.32, 639,490.19 and 428,496.76

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Solution

The fourth proportional to 429,935.32, 639,490.19 and 428,496.76 is: 637,350.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,935.32 : 639,490.19 = 428,496.76 : x
  2. Step 2: Convert to fraction form
    429,935.32/639,490.19 = 428,496.76/x
  3. Step 3: Cross multiply
    429,935.32x = 639,490.19 × 428,496.76
  4. Step 4: Simplify right side
    429,935.32x = 274,019,474,466.78
  5. Step 5: Solve for x
    x = 274,019,474,466.78/429,935.32
  6. Step 6: Final answer
    x = 637,350.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.