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Finding the Fourth Proportional to 630,169.38, 869,708.52 and 358,278.30

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Solution

The fourth proportional to 630,169.38, 869,708.52 and 358,278.30 is: 494,466.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,169.38 : 869,708.52 = 358,278.30 : x
  2. Step 2: Convert to fraction form
    630,169.38/869,708.52 = 358,278.30/x
  3. Step 3: Cross multiply
    630,169.38x = 869,708.52 × 358,278.30
  4. Step 4: Simplify right side
    630,169.38x = 311,597,690,041.12
  5. Step 5: Solve for x
    x = 311,597,690,041.12/630,169.38
  6. Step 6: Final answer
    x = 494,466.57

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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.