Home / 860,125.78-1,187,045.40-478,188.10

Finding the Fourth Proportional to 860,125.78, 1,187,045.40 and 478,188.10

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Solution

The fourth proportional to 860,125.78, 1,187,045.40 and 478,188.10 is: 659,939.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,125.78 : 1,187,045.40 = 478,188.10 : x
  2. Step 2: Convert to fraction form
    860,125.78/1,187,045.40 = 478,188.10/x
  3. Step 3: Cross multiply
    860,125.78x = 1,187,045.40 × 478,188.10
  4. Step 4: Simplify right side
    860,125.78x = 567,630,984,439.74
  5. Step 5: Solve for x
    x = 567,630,984,439.74/860,125.78
  6. Step 6: Final answer
    x = 659,939.51

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Double scale
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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.