Home / 860,185.40-1,289,840.70-505,308.20

Finding the Fourth Proportional to 860,185.40, 1,289,840.70 and 505,308.20

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Solution

The fourth proportional to 860,185.40, 1,289,840.70 and 505,308.20 is: 757,705.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,185.40 : 1,289,840.70 = 505,308.20 : x
  2. Step 2: Convert to fraction form
    860,185.40/1,289,840.70 = 505,308.20/x
  3. Step 3: Cross multiply
    860,185.40x = 1,289,840.70 × 505,308.20
  4. Step 4: Simplify right side
    860,185.40x = 651,767,082,403.74
  5. Step 5: Solve for x
    x = 651,767,082,403.74/860,185.40
  6. Step 6: Final answer
    x = 757,705.35

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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.