Home / 739,386.20-1,109,079.30-420,521.60

Finding the Fourth Proportional to 739,386.20, 1,109,079.30 and 420,521.60

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Solution

The fourth proportional to 739,386.20, 1,109,079.30 and 420,521.60 is: 630,782.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    739,386.20 : 1,109,079.30 = 420,521.60 : x
  2. Step 2: Convert to fraction form
    739,386.20/1,109,079.30 = 420,521.60/x
  3. Step 3: Cross multiply
    739,386.20x = 1,109,079.30 × 420,521.60
  4. Step 4: Simplify right side
    739,386.20x = 466,391,801,762.88
  5. Step 5: Solve for x
    x = 466,391,801,762.88/739,386.20
  6. Step 6: Final answer
    x = 630,782.40

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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.