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Finding the Fourth Proportional to 528,653.18, 729,521.83 and 286,930.57

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Solution

The fourth proportional to 528,653.18, 729,521.83 and 286,930.57 is: 395,953.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,653.18 : 729,521.83 = 286,930.57 : x
  2. Step 2: Convert to fraction form
    528,653.18/729,521.83 = 286,930.57/x
  3. Step 3: Cross multiply
    528,653.18x = 729,521.83 × 286,930.57
  4. Step 4: Simplify right side
    528,653.18x = 209,322,114,509.34
  5. Step 5: Solve for x
    x = 209,322,114,509.34/528,653.18
  6. Step 6: Final answer
    x = 395,953.57

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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.