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Finding the Fourth Proportional to 1,312,911, 1,811,817.18 and 709,299

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Solution

The fourth proportional to 1,312,911, 1,811,817.18 and 709,299 is: 978,832.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312,911 : 1,811,817.18 = 709,299 : x
  2. Step 2: Convert to fraction form
    1,312,911/1,811,817.18 = 709,299/x
  3. Step 3: Cross multiply
    1,312,911x = 1,811,817.18 × 709,299
  4. Step 4: Simplify right side
    1,312,911x = 1,285,120,113,956.82
  5. Step 5: Solve for x
    x = 1,285,120,113,956.82/1,312,911
  6. Step 6: Final answer
    x = 978,832.62

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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.