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Finding the Fourth Proportional to 630,407.89, 869,958.75 and 358,475.80

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Solution

The fourth proportional to 630,407.89, 869,958.75 and 358,475.80 is: 494,694.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,407.89 : 869,958.75 = 358,475.80 : x
  2. Step 2: Convert to fraction form
    630,407.89/869,958.75 = 358,475.80/x
  3. Step 3: Cross multiply
    630,407.89x = 869,958.75 × 358,475.80
  4. Step 4: Simplify right side
    630,407.89x = 311,859,158,873.25
  5. Step 5: Solve for x
    x = 311,859,158,873.25/630,407.89
  6. Step 6: Final answer
    x = 494,694.25

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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.