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Finding the Fourth Proportional to 276,406.47, 381,436.52 and 155,547.72

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Solution

The fourth proportional to 276,406.47, 381,436.52 and 155,547.72 is: 214,653.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    276,406.47 : 381,436.52 = 155,547.72 : x
  2. Step 2: Convert to fraction form
    276,406.47/381,436.52 = 155,547.72/x
  3. Step 3: Cross multiply
    276,406.47x = 381,436.52 × 155,547.72
  4. Step 4: Simplify right side
    276,406.47x = 59,331,580,233.00
  5. Step 5: Solve for x
    x = 59,331,580,233.00/276,406.47
  6. Step 6: Final answer
    x = 214,653.37

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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.