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Finding the Fourth Proportional to 651.84, 893.10 and 643.74

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Solution

The fourth proportional to 651.84, 893.10 and 643.74 is: 882.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    651.84 : 893.10 = 643.74 : x
  2. Step 2: Convert to fraction form
    651.84/893.10 = 643.74/x
  3. Step 3: Cross multiply
    651.84x = 893.10 × 643.74
  4. Step 4: Simplify right side
    651.84x = 574,924.19
  5. Step 5: Solve for x
    x = 574,924.19/651.84
  6. Step 6: Final answer
    x = 882.00

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.