Home / 289,010.18-398,970.42-217,417.52

Finding the Fourth Proportional to 289,010.18, 398,970.42 and 217,417.52

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Solution

The fourth proportional to 289,010.18, 398,970.42 and 217,417.52 is: 300,138.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,010.18 : 398,970.42 = 217,417.52 : x
  2. Step 2: Convert to fraction form
    289,010.18/398,970.42 = 217,417.52/x
  3. Step 3: Cross multiply
    289,010.18x = 398,970.42 × 217,417.52
  4. Step 4: Simplify right side
    289,010.18x = 86,743,159,269.76
  5. Step 5: Solve for x
    x = 86,743,159,269.76/289,010.18
  6. Step 6: Final answer
    x = 300,138.77

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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.