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Finding the Fourth Proportional to 603,653.11, 905,507.15 and 426,948.98

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Solution

The fourth proportional to 603,653.11, 905,507.15 and 426,948.98 is: 640,442.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,653.11 : 905,507.15 = 426,948.98 : x
  2. Step 2: Convert to fraction form
    603,653.11/905,507.15 = 426,948.98/x
  3. Step 3: Cross multiply
    603,653.11x = 905,507.15 × 426,948.98
  4. Step 4: Simplify right side
    603,653.11x = 386,605,349,814.51
  5. Step 5: Solve for x
    x = 386,605,349,814.51/603,653.11
  6. Step 6: Final answer
    x = 640,442.91

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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.