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Finding the Fourth Proportional to 672,999.84, 928,507.32 and 431,415.72

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Solution

The fourth proportional to 672,999.84, 928,507.32 and 431,415.72 is: 595,204.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,999.84 : 928,507.32 = 431,415.72 : x
  2. Step 2: Convert to fraction form
    672,999.84/928,507.32 = 431,415.72/x
  3. Step 3: Cross multiply
    672,999.84x = 928,507.32 × 431,415.72
  4. Step 4: Simplify right side
    672,999.84x = 400,572,653,983.07
  5. Step 5: Solve for x
    x = 400,572,653,983.07/672,999.84
  6. Step 6: Final answer
    x = 595,204.68

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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.