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Finding the Fourth Proportional to 659,776.38, 989,665.53 and 238,953.66

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Solution

The fourth proportional to 659,776.38, 989,665.53 and 238,953.66 is: 358,430.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,776.38 : 989,665.53 = 238,953.66 : x
  2. Step 2: Convert to fraction form
    659,776.38/989,665.53 = 238,953.66/x
  3. Step 3: Cross multiply
    659,776.38x = 989,665.53 × 238,953.66
  4. Step 4: Simplify right side
    659,776.38x = 236,484,200,569.34
  5. Step 5: Solve for x
    x = 236,484,200,569.34/659,776.38
  6. Step 6: Final answer
    x = 358,430.84

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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.