Home / 528,719.40-729,611.28-286,992.72

Finding the Fourth Proportional to 528,719.40, 729,611.28 and 286,992.72

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Solution

The fourth proportional to 528,719.40, 729,611.28 and 286,992.72 is: 396,038.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,719.40 : 729,611.28 = 286,992.72 : x
  2. Step 2: Convert to fraction form
    528,719.40/729,611.28 = 286,992.72/x
  3. Step 3: Cross multiply
    528,719.40x = 729,611.28 × 286,992.72
  4. Step 4: Simplify right side
    528,719.40x = 209,393,125,789.88
  5. Step 5: Solve for x
    x = 209,393,125,789.88/528,719.40
  6. Step 6: Final answer
    x = 396,038.29

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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.