Home / 830,028.60-1,245,042.90-578,086.20

Finding the Fourth Proportional to 830,028.60, 1,245,042.90 and 578,086.20

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Solution

The fourth proportional to 830,028.60, 1,245,042.90 and 578,086.20 is: 867,129.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    830,028.60 : 1,245,042.90 = 578,086.20 : x
  2. Step 2: Convert to fraction form
    830,028.60/1,245,042.90 = 578,086.20/x
  3. Step 3: Cross multiply
    830,028.60x = 1,245,042.90 × 578,086.20
  4. Step 4: Simplify right side
    830,028.60x = 719,742,118,897.98
  5. Step 5: Solve for x
    x = 719,742,118,897.98/830,028.60
  6. Step 6: Final answer
    x = 867,129.30

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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.