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Finding the Fourth Proportional to 587,235, 810,385.11 and 318,963

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Solution

The fourth proportional to 587,235, 810,385.11 and 318,963 is: 440,169.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    587,235 : 810,385.11 = 318,963 : x
  2. Step 2: Convert to fraction form
    587,235/810,385.11 = 318,963/x
  3. Step 3: Cross multiply
    587,235x = 810,385.11 × 318,963
  4. Step 4: Simplify right side
    587,235x = 258,482,865,840.93
  5. Step 5: Solve for x
    x = 258,482,865,840.93/587,235
  6. Step 6: Final answer
    x = 440,169.38

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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.