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Finding the Fourth Proportional to 707,956.20, 976,595.74 and 421,420.93

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Solution

The fourth proportional to 707,956.20, 976,595.74 and 421,420.93 is: 581,332.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    707,956.20 : 976,595.74 = 421,420.93 : x
  2. Step 2: Convert to fraction form
    707,956.20/976,595.74 = 421,420.93/x
  3. Step 3: Cross multiply
    707,956.20x = 976,595.74 × 421,420.93
  4. Step 4: Simplify right side
    707,956.20x = 411,557,881,489.80
  5. Step 5: Solve for x
    x = 411,557,881,489.80/707,956.20
  6. Step 6: Final answer
    x = 581,332.41

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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.