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Finding the Fourth Proportional to 948.61, 1,309.04 and 528.95

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Solution

The fourth proportional to 948.61, 1,309.04 and 528.95 is: 729.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    948.61 : 1,309.04 = 528.95 : x
  2. Step 2: Convert to fraction form
    948.61/1,309.04 = 528.95/x
  3. Step 3: Cross multiply
    948.61x = 1,309.04 × 528.95
  4. Step 4: Simplify right side
    948.61x = 692,416.71
  5. Step 5: Solve for x
    x = 692,416.71/948.61
  6. Step 6: Final answer
    x = 729.93

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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.