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Finding the Fourth Proportional to 657,135.40, 984,536.70 and 407,525.80

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Solution

The fourth proportional to 657,135.40, 984,536.70 and 407,525.80 is: 610,565.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,135.40 : 984,536.70 = 407,525.80 : x
  2. Step 2: Convert to fraction form
    657,135.40/984,536.70 = 407,525.80/x
  3. Step 3: Cross multiply
    657,135.40x = 984,536.70 × 407,525.80
  4. Step 4: Simplify right side
    657,135.40x = 401,224,106,296.86
  5. Step 5: Solve for x
    x = 401,224,106,296.86/657,135.40
  6. Step 6: Final answer
    x = 610,565.35

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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.