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Finding the Fourth Proportional to 1,501.92, 2,072.69 and 838.75

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Solution

The fourth proportional to 1,501.92, 2,072.69 and 838.75 is: 1,157.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,501.92 : 2,072.69 = 838.75 : x
  2. Step 2: Convert to fraction form
    1,501.92/2,072.69 = 838.75/x
  3. Step 3: Cross multiply
    1,501.92x = 2,072.69 × 838.75
  4. Step 4: Simplify right side
    1,501.92x = 1,738,468.74
  5. Step 5: Solve for x
    x = 1,738,468.74/1,501.92
  6. Step 6: Final answer
    x = 1,157.50

Related Problems

Find fourth proportional to 750.96, 1,036.35 and 419.38
Half scale
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Double scale
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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.