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Finding the Fourth Proportional to 555,415.09, 765,899.49 and 475,108.45

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Solution

The fourth proportional to 555,415.09, 765,899.49 and 475,108.45 is: 655,159.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,415.09 : 765,899.49 = 475,108.45 : x
  2. Step 2: Convert to fraction form
    555,415.09/765,899.49 = 475,108.45/x
  3. Step 3: Cross multiply
    555,415.09x = 765,899.49 × 475,108.45
  4. Step 4: Simplify right side
    555,415.09x = 363,885,319,549.69
  5. Step 5: Solve for x
    x = 363,885,319,549.69/555,415.09
  6. Step 6: Final answer
    x = 655,159.22

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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.