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Finding the Fourth Proportional to 289,341.56, 434,292.47 and 139,686.89

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Solution

The fourth proportional to 289,341.56, 434,292.47 and 139,686.89 is: 209,665.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,341.56 : 434,292.47 = 139,686.89 : x
  2. Step 2: Convert to fraction form
    289,341.56/434,292.47 = 139,686.89/x
  3. Step 3: Cross multiply
    289,341.56x = 434,292.47 × 139,686.89
  4. Step 4: Simplify right side
    289,341.56x = 60,664,964,484.72
  5. Step 5: Solve for x
    x = 60,664,964,484.72/289,341.56
  6. Step 6: Final answer
    x = 209,665.57

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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.