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Finding the Fourth Proportional to 1,213,931.70, 1,696,355.10 and 1,213,931.70

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Solution

The fourth proportional to 1,213,931.70, 1,696,355.10 and 1,213,931.70 is: 1,696,355.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,213,931.70 : 1,696,355.10 = 1,213,931.70 : x
  2. Step 2: Convert to fraction form
    1,213,931.70/1,696,355.10 = 1,213,931.70/x
  3. Step 3: Cross multiply
    1,213,931.70x = 1,696,355.10 × 1,213,931.70
  4. Step 4: Simplify right side
    1,213,931.70x = 2,059,259,230,346.67
  5. Step 5: Solve for x
    x = 2,059,259,230,346.67/1,213,931.70
  6. Step 6: Final answer
    x = 1,696,355.10

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.