Home / 830,427.60-1,245,641.40-643,803.60

Finding the Fourth Proportional to 830,427.60, 1,245,641.40 and 643,803.60

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Solution

The fourth proportional to 830,427.60, 1,245,641.40 and 643,803.60 is: 965,705.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    830,427.60 : 1,245,641.40 = 643,803.60 : x
  2. Step 2: Convert to fraction form
    830,427.60/1,245,641.40 = 643,803.60/x
  3. Step 3: Cross multiply
    830,427.60x = 1,245,641.40 × 643,803.60
  4. Step 4: Simplify right side
    830,427.60x = 801,948,417,629.04
  5. Step 5: Solve for x
    x = 801,948,417,629.04/830,427.60
  6. Step 6: Final answer
    x = 965,705.40

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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.