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Finding the Fourth Proportional to 660,400.70, 991,637.85 and 380,464.70

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Solution

The fourth proportional to 660,400.70, 991,637.85 and 380,464.70 is: 571,294.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,400.70 : 991,637.85 = 380,464.70 : x
  2. Step 2: Convert to fraction form
    660,400.70/991,637.85 = 380,464.70/x
  3. Step 3: Cross multiply
    660,400.70x = 991,637.85 × 380,464.70
  4. Step 4: Simplify right side
    660,400.70x = 377,283,197,108.90
  5. Step 5: Solve for x
    x = 377,283,197,108.90/660,400.70
  6. Step 6: Final answer
    x = 571,294.36

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1.5x scale

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.