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Finding the Fourth Proportional to 499,718.64, 689,609.65 and 270,276.18

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Solution

The fourth proportional to 499,718.64, 689,609.65 and 270,276.18 is: 372,980.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,718.64 : 689,609.65 = 270,276.18 : x
  2. Step 2: Convert to fraction form
    499,718.64/689,609.65 = 270,276.18/x
  3. Step 3: Cross multiply
    499,718.64x = 689,609.65 × 270,276.18
  4. Step 4: Simplify right side
    499,718.64x = 186,385,061,893.14
  5. Step 5: Solve for x
    x = 186,385,061,893.14/499,718.64
  6. Step 6: Final answer
    x = 372,980.01

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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.