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Finding the Fourth Proportional to 1,213,465, 1,674,581.70 and 676,921

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Solution

The fourth proportional to 1,213,465, 1,674,581.70 and 676,921 is: 934,150.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,213,465 : 1,674,581.70 = 676,921 : x
  2. Step 2: Convert to fraction form
    1,213,465/1,674,581.70 = 676,921/x
  3. Step 3: Cross multiply
    1,213,465x = 1,674,581.70 × 676,921
  4. Step 4: Simplify right side
    1,213,465x = 1,133,559,518,945.70
  5. Step 5: Solve for x
    x = 1,133,559,518,945.70/1,213,465
  6. Step 6: Final answer
    x = 934,150.98

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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.