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Finding the Fourth Proportional to 666,445.51, 919,671.92 and 380,057.77

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Solution

The fourth proportional to 666,445.51, 919,671.92 and 380,057.77 is: 524,466.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,445.51 : 919,671.92 = 380,057.77 : x
  2. Step 2: Convert to fraction form
    666,445.51/919,671.92 = 380,057.77/x
  3. Step 3: Cross multiply
    666,445.51x = 919,671.92 × 380,057.77
  4. Step 4: Simplify right side
    666,445.51x = 349,528,454,448.46
  5. Step 5: Solve for x
    x = 349,528,454,448.46/666,445.51
  6. Step 6: Final answer
    x = 524,466.67

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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.