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Finding the Fourth Proportional to 707,947.20, 976,894.56 and 421,479.36

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Solution

The fourth proportional to 707,947.20, 976,894.56 and 421,479.36 is: 581,598.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,947.20 : 976,894.56 = 421,479.36 : x
  2. Step 2: Convert to fraction form
    707,947.20/976,894.56 = 421,479.36/x
  3. Step 3: Cross multiply
    707,947.20x = 976,894.56 × 421,479.36
  4. Step 4: Simplify right side
    707,947.20x = 411,740,893,936.28
  5. Step 5: Solve for x
    x = 411,740,893,936.28/707,947.20
  6. Step 6: Final answer
    x = 581,598.31

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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.