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Finding the Fourth Proportional to 402,748.80, 604,814.40 and 216,124.80

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Solution

The fourth proportional to 402,748.80, 604,814.40 and 216,124.80 is: 324,558.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,748.80 : 604,814.40 = 216,124.80 : x
  2. Step 2: Convert to fraction form
    402,748.80/604,814.40 = 216,124.80/x
  3. Step 3: Cross multiply
    402,748.80x = 604,814.40 × 216,124.80
  4. Step 4: Simplify right side
    402,748.80x = 130,715,391,237.12
  5. Step 5: Solve for x
    x = 130,715,391,237.12/402,748.80
  6. Step 6: Final answer
    x = 324,558.11

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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.