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Finding the Fourth Proportional to 860,010.90, 1,289,688.30 and 260,772.90

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Solution

The fourth proportional to 860,010.90, 1,289,688.30 and 260,772.90 is: 391,059.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,010.90 : 1,289,688.30 = 260,772.90 : x
  2. Step 2: Convert to fraction form
    860,010.90/1,289,688.30 = 260,772.90/x
  3. Step 3: Cross multiply
    860,010.90x = 1,289,688.30 × 260,772.90
  4. Step 4: Simplify right side
    860,010.90x = 336,315,758,087.07
  5. Step 5: Solve for x
    x = 336,315,758,087.07/860,010.90
  6. Step 6: Final answer
    x = 391,059.88

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Double scale
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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.