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Finding the Fourth Proportional to 622,307.76, 858,802.08 and 380,586

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Solution

The fourth proportional to 622,307.76, 858,802.08 and 380,586 is: 525,219.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    622,307.76 : 858,802.08 = 380,586 : x
  2. Step 2: Convert to fraction form
    622,307.76/858,802.08 = 380,586/x
  3. Step 3: Cross multiply
    622,307.76x = 858,802.08 × 380,586
  4. Step 4: Simplify right side
    622,307.76x = 326,848,048,418.88
  5. Step 5: Solve for x
    x = 326,848,048,418.88/622,307.76
  6. Step 6: Final answer
    x = 525,219.30

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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.