Home / 429,934.32-639,488.70-428,495.76

Finding the Fourth Proportional to 429,934.32, 639,488.70 and 428,495.76

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Solution

The fourth proportional to 429,934.32, 639,488.70 and 428,495.76 is: 637,348.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,934.32 : 639,488.70 = 428,495.76 : x
  2. Step 2: Convert to fraction form
    429,934.32/639,488.70 = 428,495.76/x
  3. Step 3: Cross multiply
    429,934.32x = 639,488.70 × 428,495.76
  4. Step 4: Simplify right side
    429,934.32x = 274,018,196,517.91
  5. Step 5: Solve for x
    x = 274,018,196,517.91/429,934.32
  6. Step 6: Final answer
    x = 637,348.97

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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.