Home / 879,980.80-1,319,971.20-520,729.60

Finding the Fourth Proportional to 879,980.80, 1,319,971.20 and 520,729.60

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Solution

The fourth proportional to 879,980.80, 1,319,971.20 and 520,729.60 is: 781,094.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,980.80 : 1,319,971.20 = 520,729.60 : x
  2. Step 2: Convert to fraction form
    879,980.80/1,319,971.20 = 520,729.60/x
  3. Step 3: Cross multiply
    879,980.80x = 1,319,971.20 × 520,729.60
  4. Step 4: Simplify right side
    879,980.80x = 687,348,074,987.52
  5. Step 5: Solve for x
    x = 687,348,074,987.52/879,980.80
  6. Step 6: Final answer
    x = 781,094.40

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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.