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Finding the Fourth Proportional to 210,172, 315,258 and 62,428

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Solution

The fourth proportional to 210,172, 315,258 and 62,428 is: 93,642

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,172 : 315,258 = 62,428 : x
  2. Step 2: Convert to fraction form
    210,172/315,258 = 62,428/x
  3. Step 3: Cross multiply
    210,172x = 315,258 × 62,428
  4. Step 4: Simplify right side
    210,172x = 19,680,926,424
  5. Step 5: Solve for x
    x = 19,680,926,424/210,172
  6. Step 6: Final answer
    x = 93,642

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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.