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Finding the Fourth Proportional to 661,157.94, 912,772.77 and 505,817.10

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Solution

The fourth proportional to 661,157.94, 912,772.77 and 505,817.10 is: 698,314.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,157.94 : 912,772.77 = 505,817.10 : x
  2. Step 2: Convert to fraction form
    661,157.94/912,772.77 = 505,817.10/x
  3. Step 3: Cross multiply
    661,157.94x = 912,772.77 × 505,817.10
  4. Step 4: Simplify right side
    661,157.94x = 461,696,075,480.37
  5. Step 5: Solve for x
    x = 461,696,075,480.37/661,157.94
  6. Step 6: Final answer
    x = 698,314.35

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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.