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Finding the Fourth Proportional to 402,812.12, 604,218.18 and 191,810.36

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Solution

The fourth proportional to 402,812.12, 604,218.18 and 191,810.36 is: 287,715.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,812.12 : 604,218.18 = 191,810.36 : x
  2. Step 2: Convert to fraction form
    402,812.12/604,218.18 = 191,810.36/x
  3. Step 3: Cross multiply
    402,812.12x = 604,218.18 × 191,810.36
  4. Step 4: Simplify right side
    402,812.12x = 115,895,306,624.35
  5. Step 5: Solve for x
    x = 115,895,306,624.35/402,812.12
  6. Step 6: Final answer
    x = 287,715.54

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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.