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Finding the Fourth Proportional to 707,946.48, 976,965.72 and 389,994.48

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Solution

The fourth proportional to 707,946.48, 976,965.72 and 389,994.48 is: 538,192.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,946.48 : 976,965.72 = 389,994.48 : x
  2. Step 2: Convert to fraction form
    707,946.48/976,965.72 = 389,994.48/x
  3. Step 3: Cross multiply
    707,946.48x = 976,965.72 × 389,994.48
  4. Step 4: Simplify right side
    707,946.48x = 381,011,237,949.23
  5. Step 5: Solve for x
    x = 381,011,237,949.23/707,946.48
  6. Step 6: Final answer
    x = 538,192.15

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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.