Home / 528,848.60-729,811.04-287,131.20

Finding the Fourth Proportional to 528,848.60, 729,811.04 and 287,131.20

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Solution

The fourth proportional to 528,848.60, 729,811.04 and 287,131.20 is: 396,241.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,848.60 : 729,811.04 = 287,131.20 : x
  2. Step 2: Convert to fraction form
    528,848.60/729,811.04 = 287,131.20/x
  3. Step 3: Cross multiply
    528,848.60x = 729,811.04 × 287,131.20
  4. Step 4: Simplify right side
    528,848.60x = 209,551,521,774.67
  5. Step 5: Solve for x
    x = 209,551,521,774.67/528,848.60
  6. Step 6: Final answer
    x = 396,241.05

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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.