Home / 1,238,779.40-1,858,169.10-397,416.20

Finding the Fourth Proportional to 1,238,779.40, 1,858,169.10 and 397,416.20

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Solution

The fourth proportional to 1,238,779.40, 1,858,169.10 and 397,416.20 is: 596,124.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,238,779.40 : 1,858,169.10 = 397,416.20 : x
  2. Step 2: Convert to fraction form
    1,238,779.40/1,858,169.10 = 397,416.20/x
  3. Step 3: Cross multiply
    1,238,779.40x = 1,858,169.10 × 397,416.20
  4. Step 4: Simplify right side
    1,238,779.40x = 738,466,502,679.42
  5. Step 5: Solve for x
    x = 738,466,502,679.42/1,238,779.40
  6. Step 6: Final answer
    x = 596,124.30

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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.