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Finding the Fourth Proportional to 559,971.20, 839,956.80 and 489,987.20

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Solution

The fourth proportional to 559,971.20, 839,956.80 and 489,987.20 is: 734,980.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,971.20 : 839,956.80 = 489,987.20 : x
  2. Step 2: Convert to fraction form
    559,971.20/839,956.80 = 489,987.20/x
  3. Step 3: Cross multiply
    559,971.20x = 839,956.80 × 489,987.20
  4. Step 4: Simplify right side
    559,971.20x = 411,568,080,552.96
  5. Step 5: Solve for x
    x = 411,568,080,552.96/559,971.20
  6. Step 6: Final answer
    x = 734,980.80

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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.