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Finding the Fourth Proportional to 951.30, 1,312.08 and 715.32

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Solution

The fourth proportional to 951.30, 1,312.08 and 715.32 is: 986.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    951.30 : 1,312.08 = 715.32 : x
  2. Step 2: Convert to fraction form
    951.30/1,312.08 = 715.32/x
  3. Step 3: Cross multiply
    951.30x = 1,312.08 × 715.32
  4. Step 4: Simplify right side
    951.30x = 938,557.07
  5. Step 5: Solve for x
    x = 938,557.07/951.30
  6. Step 6: Final answer
    x = 986.60

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1.5x scale

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.