Home / 289,357.07-434,315.15-139,702.47

Finding the Fourth Proportional to 289,357.07, 434,315.15 and 139,702.47

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Solution

The fourth proportional to 289,357.07, 434,315.15 and 139,702.47 is: 209,688.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,357.07 : 434,315.15 = 139,702.47 : x
  2. Step 2: Convert to fraction form
    289,357.07/434,315.15 = 139,702.47/x
  3. Step 3: Cross multiply
    289,357.07x = 434,315.15 × 139,702.47
  4. Step 4: Simplify right side
    289,357.07x = 60,674,898,514.91
  5. Step 5: Solve for x
    x = 60,674,898,514.91/289,357.07
  6. Step 6: Final answer
    x = 209,688.67

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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.