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Finding the Fourth Proportional to 707,958.20, 976,598.50 and 421,422.93

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Solution

The fourth proportional to 707,958.20, 976,598.50 and 421,422.93 is: 581,335.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,958.20 : 976,598.50 = 421,422.93 : x
  2. Step 2: Convert to fraction form
    707,958.20/976,598.50 = 421,422.93/x
  3. Step 3: Cross multiply
    707,958.20x = 976,598.50 × 421,422.93
  4. Step 4: Simplify right side
    707,958.20x = 411,561,001,303.61
  5. Step 5: Solve for x
    x = 411,561,001,303.61/707,958.20
  6. Step 6: Final answer
    x = 581,335.17

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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.