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Finding the Fourth Proportional to 315,089.76, 434,813.04 and 187,699.20

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Solution

The fourth proportional to 315,089.76, 434,813.04 and 187,699.20 is: 259,018.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,089.76 : 434,813.04 = 187,699.20 : x
  2. Step 2: Convert to fraction form
    315,089.76/434,813.04 = 187,699.20/x
  3. Step 3: Cross multiply
    315,089.76x = 434,813.04 × 187,699.20
  4. Step 4: Simplify right side
    315,089.76x = 81,614,059,757.57
  5. Step 5: Solve for x
    x = 81,614,059,757.57/315,089.76
  6. Step 6: Final answer
    x = 259,018.45

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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.