Home / 860,289.12-1,187,192.40-478,312.56

Finding the Fourth Proportional to 860,289.12, 1,187,192.40 and 478,312.56

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Solution

The fourth proportional to 860,289.12, 1,187,192.40 and 478,312.56 is: 660,067.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,289.12 : 1,187,192.40 = 478,312.56 : x
  2. Step 2: Convert to fraction form
    860,289.12/1,187,192.40 = 478,312.56/x
  3. Step 3: Cross multiply
    860,289.12x = 1,187,192.40 × 478,312.56
  4. Step 4: Simplify right side
    860,289.12x = 567,849,036,056.54
  5. Step 5: Solve for x
    x = 567,849,036,056.54/860,289.12
  6. Step 6: Final answer
    x = 660,067.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.