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Finding the Fourth Proportional to 528,419.69, 729,197.91 and 286,693.01

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Solution

The fourth proportional to 528,419.69, 729,197.91 and 286,693.01 is: 395,624.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,419.69 : 729,197.91 = 286,693.01 : x
  2. Step 2: Convert to fraction form
    528,419.69/729,197.91 = 286,693.01/x
  3. Step 3: Cross multiply
    528,419.69x = 729,197.91 × 286,693.01
  4. Step 4: Simplify right side
    528,419.69x = 209,055,943,703.61
  5. Step 5: Solve for x
    x = 209,055,943,703.61/528,419.69
  6. Step 6: Final answer
    x = 395,624.82

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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.