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Finding the Fourth Proportional to 660,333.86, 912,009.12 and 445,103.90

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Solution

The fourth proportional to 660,333.86, 912,009.12 and 445,103.90 is: 614,747.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,333.86 : 912,009.12 = 445,103.90 : x
  2. Step 2: Convert to fraction form
    660,333.86/912,009.12 = 445,103.90/x
  3. Step 3: Cross multiply
    660,333.86x = 912,009.12 × 445,103.90
  4. Step 4: Simplify right side
    660,333.86x = 405,938,818,427.59
  5. Step 5: Solve for x
    x = 405,938,818,427.59/660,333.86
  6. Step 6: Final answer
    x = 614,747.84

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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.