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Finding the Fourth Proportional to 661,653.75, 990,881.93 and 376,480.29

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Solution

The fourth proportional to 661,653.75, 990,881.93 and 376,480.29 is: 563,810.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,653.75 : 990,881.93 = 376,480.29 : x
  2. Step 2: Convert to fraction form
    661,653.75/990,881.93 = 376,480.29/x
  3. Step 3: Cross multiply
    661,653.75x = 990,881.93 × 376,480.29
  4. Step 4: Simplify right side
    661,653.75x = 373,047,514,479.76
  5. Step 5: Solve for x
    x = 373,047,514,479.76/661,653.75
  6. Step 6: Final answer
    x = 563,810.78

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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.