Home / 879,456.40-1,319,184.60-280,412.80

Finding the Fourth Proportional to 879,456.40, 1,319,184.60 and 280,412.80

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Solution

The fourth proportional to 879,456.40, 1,319,184.60 and 280,412.80 is: 420,619.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    879,456.40 : 1,319,184.60 = 280,412.80 : x
  2. Step 2: Convert to fraction form
    879,456.40/1,319,184.60 = 280,412.80/x
  3. Step 3: Cross multiply
    879,456.40x = 1,319,184.60 × 280,412.80
  4. Step 4: Simplify right side
    879,456.40x = 369,916,247,402.88
  5. Step 5: Solve for x
    x = 369,916,247,402.88/879,456.40
  6. Step 6: Final answer
    x = 420,619.20

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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.