Home / 668,899.40-1,003,502.40-289,883.78

Finding the Fourth Proportional to 668,899.40, 1,003,502.40 and 289,883.78

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Solution

The fourth proportional to 668,899.40, 1,003,502.40 and 289,883.78 is: 434,892.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    668,899.40 : 1,003,502.40 = 289,883.78 : x
  2. Step 2: Convert to fraction form
    668,899.40/1,003,502.40 = 289,883.78/x
  3. Step 3: Cross multiply
    668,899.40x = 1,003,502.40 × 289,883.78
  4. Step 4: Simplify right side
    668,899.40x = 290,899,068,951.07
  5. Step 5: Solve for x
    x = 290,899,068,951.07/668,899.40
  6. Step 6: Final answer
    x = 434,892.11

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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.