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Finding the Fourth Proportional to 288,323.70, 432,485.55 and 208,607.55

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Solution

The fourth proportional to 288,323.70, 432,485.55 and 208,607.55 is: 312,911.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,323.70 : 432,485.55 = 208,607.55 : x
  2. Step 2: Convert to fraction form
    288,323.70/432,485.55 = 208,607.55/x
  3. Step 3: Cross multiply
    288,323.70x = 432,485.55 × 208,607.55
  4. Step 4: Simplify right side
    288,323.70x = 90,219,750,995.90
  5. Step 5: Solve for x
    x = 90,219,750,995.90/288,323.70
  6. Step 6: Final answer
    x = 312,911.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.