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Finding the Fourth Proportional to 630,407.88, 869,958.75 and 358,475.79

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Solution

The fourth proportional to 630,407.88, 869,958.75 and 358,475.79 is: 494,694.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,407.88 : 869,958.75 = 358,475.79 : x
  2. Step 2: Convert to fraction form
    630,407.88/869,958.75 = 358,475.79/x
  3. Step 3: Cross multiply
    630,407.88x = 869,958.75 × 358,475.79
  4. Step 4: Simplify right side
    630,407.88x = 311,859,150,173.66
  5. Step 5: Solve for x
    x = 311,859,150,173.66/630,407.88
  6. Step 6: Final answer
    x = 494,694.24

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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.