Home / 645,161.71-890,225.48-369,476.69

Finding the Fourth Proportional to 645,161.71, 890,225.48 and 369,476.69

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Solution

The fourth proportional to 645,161.71, 890,225.48 and 369,476.69 is: 509,821.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,161.71 : 890,225.48 = 369,476.69 : x
  2. Step 2: Convert to fraction form
    645,161.71/890,225.48 = 369,476.69/x
  3. Step 3: Cross multiply
    645,161.71x = 890,225.48 × 369,476.69
  4. Step 4: Simplify right side
    645,161.71x = 328,917,563,704.06
  5. Step 5: Solve for x
    x = 328,917,563,704.06/645,161.71
  6. Step 6: Final answer
    x = 509,821.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.