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Finding the Fourth Proportional to 579,860.64, 869,656.32 and 159,170.40

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Solution

The fourth proportional to 579,860.64, 869,656.32 and 159,170.40 is: 238,718.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,860.64 : 869,656.32 = 159,170.40 : x
  2. Step 2: Convert to fraction form
    579,860.64/869,656.32 = 159,170.40/x
  3. Step 3: Cross multiply
    579,860.64x = 869,656.32 × 159,170.40
  4. Step 4: Simplify right side
    579,860.64x = 138,423,544,316.93
  5. Step 5: Solve for x
    x = 138,423,544,316.93/579,860.64
  6. Step 6: Final answer
    x = 238,718.64

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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.