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Finding the Fourth Proportional to 621,370.07, 857,482.54 and 349,437.88

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Solution

The fourth proportional to 621,370.07, 857,482.54 and 349,437.88 is: 482,219.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,370.07 : 857,482.54 = 349,437.88 : x
  2. Step 2: Convert to fraction form
    621,370.07/857,482.54 = 349,437.88/x
  3. Step 3: Cross multiply
    621,370.07x = 857,482.54 × 349,437.88
  4. Step 4: Simplify right side
    621,370.07x = 299,636,880,914.62
  5. Step 5: Solve for x
    x = 299,636,880,914.62/621,370.07
  6. Step 6: Final answer
    x = 482,219.69

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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.