Home / 818,779.20-1,228,168.80-458,580.30

Finding the Fourth Proportional to 818,779.20, 1,228,168.80 and 458,580.30

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Solution

The fourth proportional to 818,779.20, 1,228,168.80 and 458,580.30 is: 687,870.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    818,779.20 : 1,228,168.80 = 458,580.30 : x
  2. Step 2: Convert to fraction form
    818,779.20/1,228,168.80 = 458,580.30/x
  3. Step 3: Cross multiply
    818,779.20x = 1,228,168.80 × 458,580.30
  4. Step 4: Simplify right side
    818,779.20x = 563,214,016,754.64
  5. Step 5: Solve for x
    x = 563,214,016,754.64/818,779.20
  6. Step 6: Final answer
    x = 687,870.45

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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.