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Finding the Fourth Proportional to 421,031.28, 630,515.88 and 270,798.96

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Solution

The fourth proportional to 421,031.28, 630,515.88 and 270,798.96 is: 405,535.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,031.28 : 630,515.88 = 270,798.96 : x
  2. Step 2: Convert to fraction form
    421,031.28/630,515.88 = 270,798.96/x
  3. Step 3: Cross multiply
    421,031.28x = 630,515.88 × 270,798.96
  4. Step 4: Simplify right side
    421,031.28x = 170,743,044,567.49
  5. Step 5: Solve for x
    x = 170,743,044,567.49/421,031.28
  6. Step 6: Final answer
    x = 405,535.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.