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Finding the Fourth Proportional to 436.66, 653.35 and 260.31

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Solution

The fourth proportional to 436.66, 653.35 and 260.31 is: 389.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    436.66 : 653.35 = 260.31 : x
  2. Step 2: Convert to fraction form
    436.66/653.35 = 260.31/x
  3. Step 3: Cross multiply
    436.66x = 653.35 × 260.31
  4. Step 4: Simplify right side
    436.66x = 170,075.83
  5. Step 5: Solve for x
    x = 170,075.83/436.66
  6. Step 6: Final answer
    x = 389.50

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.