Home / 648,742.40-973,113.60-612,000.80

Finding the Fourth Proportional to 648,742.40, 973,113.60 and 612,000.80

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Solution

The fourth proportional to 648,742.40, 973,113.60 and 612,000.80 is: 918,001.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,742.40 : 973,113.60 = 612,000.80 : x
  2. Step 2: Convert to fraction form
    648,742.40/973,113.60 = 612,000.80/x
  3. Step 3: Cross multiply
    648,742.40x = 973,113.60 × 612,000.80
  4. Step 4: Simplify right side
    648,742.40x = 595,546,301,690.88
  5. Step 5: Solve for x
    x = 595,546,301,690.88/648,742.40
  6. Step 6: Final answer
    x = 918,001.20

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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.