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Finding the Fourth Proportional to 761.63, 1,051.05 and 412.32

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Solution

The fourth proportional to 761.63, 1,051.05 and 412.32 is: 569.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    761.63 : 1,051.05 = 412.32 : x
  2. Step 2: Convert to fraction form
    761.63/1,051.05 = 412.32/x
  3. Step 3: Cross multiply
    761.63x = 1,051.05 × 412.32
  4. Step 4: Simplify right side
    761.63x = 433,368.94
  5. Step 5: Solve for x
    x = 433,368.94/761.63
  6. Step 6: Final answer
    x = 569.01

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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.