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Finding the Fourth Proportional to 528,645.51, 729,531.53 and 286,928.03

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Solution

The fourth proportional to 528,645.51, 729,531.53 and 286,928.03 is: 395,961.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,645.51 : 729,531.53 = 286,928.03 : x
  2. Step 2: Convert to fraction form
    528,645.51/729,531.53 = 286,928.03/x
  3. Step 3: Cross multiply
    528,645.51x = 729,531.53 × 286,928.03
  4. Step 4: Simplify right side
    528,645.51x = 209,323,039,643.49
  5. Step 5: Solve for x
    x = 209,323,039,643.49/528,645.51
  6. Step 6: Final answer
    x = 395,961.07

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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.