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Finding the Fourth Proportional to 630,338.22, 869,907.88 and 358,431.42

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Solution

The fourth proportional to 630,338.22, 869,907.88 and 358,431.42 is: 494,658.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,338.22 : 869,907.88 = 358,431.42 : x
  2. Step 2: Convert to fraction form
    630,338.22/869,907.88 = 358,431.42/x
  3. Step 3: Cross multiply
    630,338.22x = 869,907.88 × 358,431.42
  4. Step 4: Simplify right side
    630,338.22x = 311,802,316,697.59
  5. Step 5: Solve for x
    x = 311,802,316,697.59/630,338.22
  6. Step 6: Final answer
    x = 494,658.75

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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.