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Finding the Fourth Proportional to 260,577.30, 390,865.95 and 256,640.70

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Solution

The fourth proportional to 260,577.30, 390,865.95 and 256,640.70 is: 384,961.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,577.30 : 390,865.95 = 256,640.70 : x
  2. Step 2: Convert to fraction form
    260,577.30/390,865.95 = 256,640.70/x
  3. Step 3: Cross multiply
    260,577.30x = 390,865.95 × 256,640.70
  4. Step 4: Simplify right side
    260,577.30x = 100,312,111,014.17
  5. Step 5: Solve for x
    x = 100,312,111,014.17/260,577.30
  6. Step 6: Final answer
    x = 384,961.05

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1.5x scale

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.