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Finding the Fourth Proportional to 666,190.64, 919,320 and 379,802.96

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Solution

The fourth proportional to 666,190.64, 919,320 and 379,802.96 is: 524,114.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,190.64 : 919,320 = 379,802.96 : x
  2. Step 2: Convert to fraction form
    666,190.64/919,320 = 379,802.96/x
  3. Step 3: Cross multiply
    666,190.64x = 919,320 × 379,802.96
  4. Step 4: Simplify right side
    666,190.64x = 349,160,457,187.20
  5. Step 5: Solve for x
    x = 349,160,457,187.20/666,190.64
  6. Step 6: Final answer
    x = 524,114.92

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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.