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Finding the Fourth Proportional to 210,980.13, 291,152.88 and 115,492.86

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Solution

The fourth proportional to 210,980.13, 291,152.88 and 115,492.86 is: 159,380.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    210,980.13 : 291,152.88 = 115,492.86 : x
  2. Step 2: Convert to fraction form
    210,980.13/291,152.88 = 115,492.86/x
  3. Step 3: Cross multiply
    210,980.13x = 291,152.88 × 115,492.86
  4. Step 4: Simplify right side
    210,980.13x = 33,626,078,808.44
  5. Step 5: Solve for x
    x = 33,626,078,808.44/210,980.13
  6. Step 6: Final answer
    x = 159,380.31

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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.