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Finding the Fourth Proportional to 630,170.38, 869,709.90 and 358,279.30

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Solution

The fourth proportional to 630,170.38, 869,709.90 and 358,279.30 is: 494,467.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,170.38 : 869,709.90 = 358,279.30 : x
  2. Step 2: Convert to fraction form
    630,170.38/869,709.90 = 358,279.30/x
  3. Step 3: Cross multiply
    630,170.38x = 869,709.90 × 358,279.30
  4. Step 4: Simplify right side
    630,170.38x = 311,599,054,175.07
  5. Step 5: Solve for x
    x = 311,599,054,175.07/630,170.38
  6. Step 6: Final answer
    x = 494,467.95

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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.