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Finding the Fourth Proportional to 860,148.64, 1,186,958.64 and 478,148.32

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Solution

The fourth proportional to 860,148.64, 1,186,958.64 and 478,148.32 is: 659,818.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    860,148.64 : 1,186,958.64 = 478,148.32 : x
  2. Step 2: Convert to fraction form
    860,148.64/1,186,958.64 = 478,148.32/x
  3. Step 3: Cross multiply
    860,148.64x = 1,186,958.64 × 478,148.32
  4. Step 4: Simplify right side
    860,148.64x = 567,542,279,625.49
  5. Step 5: Solve for x
    x = 567,542,279,625.49/860,148.64
  6. Step 6: Final answer
    x = 659,818.84

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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.