Home / 630,421.60-869,949.84-343,939.36

Finding the Fourth Proportional to 630,421.60, 869,949.84 and 343,939.36

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Solution

The fourth proportional to 630,421.60, 869,949.84 and 343,939.36 is: 474,618.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,421.60 : 869,949.84 = 343,939.36 : x
  2. Step 2: Convert to fraction form
    630,421.60/869,949.84 = 343,939.36/x
  3. Step 3: Cross multiply
    630,421.60x = 869,949.84 × 343,939.36
  4. Step 4: Simplify right side
    630,421.60x = 299,209,991,201.70
  5. Step 5: Solve for x
    x = 299,209,991,201.70/630,421.60
  6. Step 6: Final answer
    x = 474,618.88

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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.