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Finding the Fourth Proportional to 310,552.16, 465,505.12 and 210,721.28

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Solution

The fourth proportional to 310,552.16, 465,505.12 and 210,721.28 is: 315,862.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,552.16 : 465,505.12 = 210,721.28 : x
  2. Step 2: Convert to fraction form
    310,552.16/465,505.12 = 210,721.28/x
  3. Step 3: Cross multiply
    310,552.16x = 465,505.12 × 210,721.28
  4. Step 4: Simplify right side
    310,552.16x = 98,091,834,732.95
  5. Step 5: Solve for x
    x = 98,091,834,732.95/310,552.16
  6. Step 6: Final answer
    x = 315,862.67

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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.