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Finding the Fourth Proportional to 707,904.04, 976,908.90 and 421,434.04

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Solution

The fourth proportional to 707,904.04, 976,908.90 and 421,434.04 is: 581,579.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,904.04 : 976,908.90 = 421,434.04 : x
  2. Step 2: Convert to fraction form
    707,904.04/976,908.90 = 421,434.04/x
  3. Step 3: Cross multiply
    707,904.04x = 976,908.90 × 421,434.04
  4. Step 4: Simplify right side
    707,904.04x = 411,702,664,438.96
  5. Step 5: Solve for x
    x = 411,702,664,438.96/707,904.04
  6. Step 6: Final answer
    x = 581,579.76

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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.