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Finding the Fourth Proportional to 629,718.32, 869,011.53 and 357,786.57

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Solution

The fourth proportional to 629,718.32, 869,011.53 and 357,786.57 is: 493,745.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    629,718.32 : 869,011.53 = 357,786.57 : x
  2. Step 2: Convert to fraction form
    629,718.32/869,011.53 = 357,786.57/x
  3. Step 3: Cross multiply
    629,718.32x = 869,011.53 × 357,786.57
  4. Step 4: Simplify right side
    629,718.32x = 310,920,656,526.25
  5. Step 5: Solve for x
    x = 310,920,656,526.25/629,718.32
  6. Step 6: Final answer
    x = 493,745.61

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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.