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Finding the Fourth Proportional to 838.08, 1,156.40 and 470.08

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Solution

The fourth proportional to 838.08, 1,156.40 and 470.08 is: 648.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    838.08 : 1,156.40 = 470.08 : x
  2. Step 2: Convert to fraction form
    838.08/1,156.40 = 470.08/x
  3. Step 3: Cross multiply
    838.08x = 1,156.40 × 470.08
  4. Step 4: Simplify right side
    838.08x = 543,600.51
  5. Step 5: Solve for x
    x = 543,600.51/838.08
  6. Step 6: Final answer
    x = 648.63

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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.