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Finding the Fourth Proportional to 666,858.78, 920,254.23 and 380,377.98

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Solution

The fourth proportional to 666,858.78, 920,254.23 and 380,377.98 is: 524,915.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,858.78 : 920,254.23 = 380,377.98 : x
  2. Step 2: Convert to fraction form
    666,858.78/920,254.23 = 380,377.98/x
  3. Step 3: Cross multiply
    666,858.78x = 920,254.23 × 380,377.98
  4. Step 4: Simplify right side
    666,858.78x = 350,044,445,093.86
  5. Step 5: Solve for x
    x = 350,044,445,093.86/666,858.78
  6. Step 6: Final answer
    x = 524,915.40

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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.