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Finding the Fourth Proportional to 1,316.24, 1,970.16 and 925.76

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Solution

The fourth proportional to 1,316.24, 1,970.16 and 925.76 is: 1,385.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,316.24 : 1,970.16 = 925.76 : x
  2. Step 2: Convert to fraction form
    1,316.24/1,970.16 = 925.76/x
  3. Step 3: Cross multiply
    1,316.24x = 1,970.16 × 925.76
  4. Step 4: Simplify right side
    1,316.24x = 1,823,895.32
  5. Step 5: Solve for x
    x = 1,823,895.32/1,316.24
  6. Step 6: Final answer
    x = 1,385.69

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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.