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Finding the Fourth Proportional to 666,423.88, 918,708.40 and 475,105.12

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Solution

The fourth proportional to 666,423.88, 918,708.40 and 475,105.12 is: 654,963.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,423.88 : 918,708.40 = 475,105.12 : x
  2. Step 2: Convert to fraction form
    666,423.88/918,708.40 = 475,105.12/x
  3. Step 3: Cross multiply
    666,423.88x = 918,708.40 × 475,105.12
  4. Step 4: Simplify right side
    666,423.88x = 436,483,064,627.01
  5. Step 5: Solve for x
    x = 436,483,064,627.01/666,423.88
  6. Step 6: Final answer
    x = 654,963.12

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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.