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Finding the Fourth Proportional to 623.56, 860.50 and 347.56

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Solution

The fourth proportional to 623.56, 860.50 and 347.56 is: 479.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    623.56 : 860.50 = 347.56 : x
  2. Step 2: Convert to fraction form
    623.56/860.50 = 347.56/x
  3. Step 3: Cross multiply
    623.56x = 860.50 × 347.56
  4. Step 4: Simplify right side
    623.56x = 299,075.38
  5. Step 5: Solve for x
    x = 299,075.38/623.56
  6. Step 6: Final answer
    x = 479.63

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1.5x scale

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.