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Finding the Fourth Proportional to 768,379.32, 1,059,377.79 and 630,048.64

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Solution

The fourth proportional to 768,379.32, 1,059,377.79 and 630,048.64 is: 868,658.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,379.32 : 1,059,377.79 = 630,048.64 : x
  2. Step 2: Convert to fraction form
    768,379.32/1,059,377.79 = 630,048.64/x
  3. Step 3: Cross multiply
    768,379.32x = 1,059,377.79 × 630,048.64
  4. Step 4: Simplify right side
    768,379.32x = 667,459,535,835.71
  5. Step 5: Solve for x
    x = 667,459,535,835.71/768,379.32
  6. Step 6: Final answer
    x = 868,658.90

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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.