Home / 921,126.51-1,381,900.10-281,521.28

Finding the Fourth Proportional to 921,126.51, 1,381,900.10 and 281,521.28

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Solution

The fourth proportional to 921,126.51, 1,381,900.10 and 281,521.28 is: 422,346.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    921,126.51 : 1,381,900.10 = 281,521.28 : x
  2. Step 2: Convert to fraction form
    921,126.51/1,381,900.10 = 281,521.28/x
  3. Step 3: Cross multiply
    921,126.51x = 1,381,900.10 × 281,521.28
  4. Step 4: Simplify right side
    921,126.51x = 389,034,276,667.02
  5. Step 5: Solve for x
    x = 389,034,276,667.02/921,126.51
  6. Step 6: Final answer
    x = 422,346.20

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Double scale
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Similar ratio
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1.5x scale

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.