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Finding the Fourth Proportional to 528,670.57, 729,545.85 and 286,948.05

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Solution

The fourth proportional to 528,670.57, 729,545.85 and 286,948.05 is: 395,977.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,670.57 : 729,545.85 = 286,948.05 : x
  2. Step 2: Convert to fraction form
    528,670.57/729,545.85 = 286,948.05/x
  3. Step 3: Cross multiply
    528,670.57x = 729,545.85 × 286,948.05
  4. Step 4: Simplify right side
    528,670.57x = 209,341,759,043.09
  5. Step 5: Solve for x
    x = 209,341,759,043.09/528,670.57
  6. Step 6: Final answer
    x = 395,977.71

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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.