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Finding the Fourth Proportional to 677,462.10, 934,830.36 and 391,074.45

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Solution

The fourth proportional to 677,462.10, 934,830.36 and 391,074.45 is: 539,643.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    677,462.10 : 934,830.36 = 391,074.45 : x
  2. Step 2: Convert to fraction form
    677,462.10/934,830.36 = 391,074.45/x
  3. Step 3: Cross multiply
    677,462.10x = 934,830.36 × 391,074.45
  4. Step 4: Simplify right side
    677,462.10x = 365,588,268,880.30
  5. Step 5: Solve for x
    x = 365,588,268,880.30/677,462.10
  6. Step 6: Final answer
    x = 539,643.87

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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.