Home / 287,664.40-431,495.99-77,302.34

Finding the Fourth Proportional to 287,664.40, 431,495.99 and 77,302.34

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Solution

The fourth proportional to 287,664.40, 431,495.99 and 77,302.34 is: 115,953.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,664.40 : 431,495.99 = 77,302.34 : x
  2. Step 2: Convert to fraction form
    287,664.40/431,495.99 = 77,302.34/x
  3. Step 3: Cross multiply
    287,664.40x = 431,495.99 × 77,302.34
  4. Step 4: Simplify right side
    287,664.40x = 33,355,649,727.62
  5. Step 5: Solve for x
    x = 33,355,649,727.62/287,664.40
  6. Step 6: Final answer
    x = 115,953.35

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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.