Home / 879,561.40-1,319,342.10-280,566.40

Finding the Fourth Proportional to 879,561.40, 1,319,342.10 and 280,566.40

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Solution

The fourth proportional to 879,561.40, 1,319,342.10 and 280,566.40 is: 420,849.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,561.40 : 1,319,342.10 = 280,566.40 : x
  2. Step 2: Convert to fraction form
    879,561.40/1,319,342.10 = 280,566.40/x
  3. Step 3: Cross multiply
    879,561.40x = 1,319,342.10 × 280,566.40
  4. Step 4: Simplify right side
    879,561.40x = 370,163,063,365.44
  5. Step 5: Solve for x
    x = 370,163,063,365.44/879,561.40
  6. Step 6: Final answer
    x = 420,849.60

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Double scale
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Similar ratio
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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.