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Finding the Fourth Proportional to 630,408.89, 869,960.13 and 358,476.80

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Solution

The fourth proportional to 630,408.89, 869,960.13 and 358,476.80 is: 494,695.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,408.89 : 869,960.13 = 358,476.80 : x
  2. Step 2: Convert to fraction form
    630,408.89/869,960.13 = 358,476.80/x
  3. Step 3: Cross multiply
    630,408.89x = 869,960.13 × 358,476.80
  4. Step 4: Simplify right side
    630,408.89x = 311,860,523,529.98
  5. Step 5: Solve for x
    x = 311,860,523,529.98/630,408.89
  6. Step 6: Final answer
    x = 494,695.63

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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.