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Finding the Fourth Proportional to 525,856.08, 725,639.40 and 311,005.20

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Solution

The fourth proportional to 525,856.08, 725,639.40 and 311,005.20 is: 429,162.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,856.08 : 725,639.40 = 311,005.20 : x
  2. Step 2: Convert to fraction form
    525,856.08/725,639.40 = 311,005.20/x
  3. Step 3: Cross multiply
    525,856.08x = 725,639.40 × 311,005.20
  4. Step 4: Simplify right side
    525,856.08x = 225,677,626,724.88
  5. Step 5: Solve for x
    x = 225,677,626,724.88/525,856.08
  6. Step 6: Final answer
    x = 429,162.34

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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.