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Finding the Fourth Proportional to 709,825, 1,064,212.62 and 429,279.88

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Solution

The fourth proportional to 709,825, 1,064,212.62 and 429,279.88 is: 643,602.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,825 : 1,064,212.62 = 429,279.88 : x
  2. Step 2: Convert to fraction form
    709,825/1,064,212.62 = 429,279.88/x
  3. Step 3: Cross multiply
    709,825x = 1,064,212.62 × 429,279.88
  4. Step 4: Simplify right side
    709,825x = 456,845,065,808.09
  5. Step 5: Solve for x
    x = 456,845,065,808.09/709,825
  6. Step 6: Final answer
    x = 643,602.39

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.