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Finding the Fourth Proportional to 999,677.34, 1,378,119.69 and 712,699.20

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Solution

The fourth proportional to 999,677.34, 1,378,119.69 and 712,699.20 is: 982,501.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    999,677.34 : 1,378,119.69 = 712,699.20 : x
  2. Step 2: Convert to fraction form
    999,677.34/1,378,119.69 = 712,699.20/x
  3. Step 3: Cross multiply
    999,677.34x = 1,378,119.69 × 712,699.20
  4. Step 4: Simplify right side
    999,677.34x = 982,184,800,567.25
  5. Step 5: Solve for x
    x = 982,184,800,567.25/999,677.34
  6. Step 6: Final answer
    x = 982,501.81

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1.5x scale

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.