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Finding the Fourth Proportional to 760.30, 1,140.54 and 291.95

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Solution

The fourth proportional to 760.30, 1,140.54 and 291.95 is: 437.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    760.30 : 1,140.54 = 291.95 : x
  2. Step 2: Convert to fraction form
    760.30/1,140.54 = 291.95/x
  3. Step 3: Cross multiply
    760.30x = 1,140.54 × 291.95
  4. Step 4: Simplify right side
    760.30x = 332,980.65
  5. Step 5: Solve for x
    x = 332,980.65/760.30
  6. Step 6: Final answer
    x = 437.96

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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.