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Finding the Fourth Proportional to 528,637.19, 729,521.52 and 286,920.11

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Solution

The fourth proportional to 528,637.19, 729,521.52 and 286,920.11 is: 395,950.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,637.19 : 729,521.52 = 286,920.11 : x
  2. Step 2: Convert to fraction form
    528,637.19/729,521.52 = 286,920.11/x
  3. Step 3: Cross multiply
    528,637.19x = 729,521.52 × 286,920.11
  4. Step 4: Simplify right side
    528,637.19x = 209,314,394,765.77
  5. Step 5: Solve for x
    x = 209,314,394,765.77/528,637.19
  6. Step 6: Final answer
    x = 395,950.94

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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.