Home / 678,557.60-1,017,836.40-346,090.40

Finding the Fourth Proportional to 678,557.60, 1,017,836.40 and 346,090.40

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Solution

The fourth proportional to 678,557.60, 1,017,836.40 and 346,090.40 is: 519,135.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,557.60 : 1,017,836.40 = 346,090.40 : x
  2. Step 2: Convert to fraction form
    678,557.60/1,017,836.40 = 346,090.40/x
  3. Step 3: Cross multiply
    678,557.60x = 1,017,836.40 × 346,090.40
  4. Step 4: Simplify right side
    678,557.60x = 352,263,406,810.56
  5. Step 5: Solve for x
    x = 352,263,406,810.56/678,557.60
  6. Step 6: Final answer
    x = 519,135.60

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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.