Home / 641,865.96-885,802.70-355,386.05

Finding the Fourth Proportional to 641,865.96, 885,802.70 and 355,386.05

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Solution

The fourth proportional to 641,865.96, 885,802.70 and 355,386.05 is: 490,448.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,865.96 : 885,802.70 = 355,386.05 : x
  2. Step 2: Convert to fraction form
    641,865.96/885,802.70 = 355,386.05/x
  3. Step 3: Cross multiply
    641,865.96x = 885,802.70 × 355,386.05
  4. Step 4: Simplify right side
    641,865.96x = 314,801,919,091.79
  5. Step 5: Solve for x
    x = 314,801,919,091.79/641,865.96
  6. Step 6: Final answer
    x = 490,448.07

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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.