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Finding the Fourth Proportional to 509,798.40, 765,280.80 and 299,554.80

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Solution

The fourth proportional to 509,798.40, 765,280.80 and 299,554.80 is: 449,674.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,798.40 : 765,280.80 = 299,554.80 : x
  2. Step 2: Convert to fraction form
    509,798.40/765,280.80 = 299,554.80/x
  3. Step 3: Cross multiply
    509,798.40x = 765,280.80 × 299,554.80
  4. Step 4: Simplify right side
    509,798.40x = 229,243,536,987.84
  5. Step 5: Solve for x
    x = 229,243,536,987.84/509,798.40
  6. Step 6: Final answer
    x = 449,674.89

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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.