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Finding the Fourth Proportional to 256,492.10, 384,779.51 and 78,999.05

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Solution

The fourth proportional to 256,492.10, 384,779.51 and 78,999.05 is: 118,511.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,492.10 : 384,779.51 = 78,999.05 : x
  2. Step 2: Convert to fraction form
    256,492.10/384,779.51 = 78,999.05/x
  3. Step 3: Cross multiply
    256,492.10x = 384,779.51 × 78,999.05
  4. Step 4: Simplify right side
    256,492.10x = 30,397,213,430.57
  5. Step 5: Solve for x
    x = 30,397,213,430.57/256,492.10
  6. Step 6: Final answer
    x = 118,511.31

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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.