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Finding the Fourth Proportional to 807,347.60, 1,211,021.40 and 618,390.80

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Solution

The fourth proportional to 807,347.60, 1,211,021.40 and 618,390.80 is: 927,586.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    807,347.60 : 1,211,021.40 = 618,390.80 : x
  2. Step 2: Convert to fraction form
    807,347.60/1,211,021.40 = 618,390.80/x
  3. Step 3: Cross multiply
    807,347.60x = 1,211,021.40 × 618,390.80
  4. Step 4: Simplify right side
    807,347.60x = 748,884,492,363.12
  5. Step 5: Solve for x
    x = 748,884,492,363.12/807,347.60
  6. Step 6: Final answer
    x = 927,586.20

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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.