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Finding the Fourth Proportional to 666,531.56, 918,856.68 and 475,212.80

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Solution

The fourth proportional to 666,531.56, 918,856.68 and 475,212.80 is: 655,111.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,531.56 : 918,856.68 = 475,212.80 : x
  2. Step 2: Convert to fraction form
    666,531.56/918,856.68 = 475,212.80/x
  3. Step 3: Cross multiply
    666,531.56x = 918,856.68 × 475,212.80
  4. Step 4: Simplify right side
    666,531.56x = 436,652,455,701.50
  5. Step 5: Solve for x
    x = 436,652,455,701.50/666,531.56
  6. Step 6: Final answer
    x = 655,111.45

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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.