Home / 420,389.65-580,150.05-229,415.36

Finding the Fourth Proportional to 420,389.65, 580,150.05 and 229,415.36

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Solution

The fourth proportional to 420,389.65, 580,150.05 and 229,415.36 is: 316,599.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,389.65 : 580,150.05 = 229,415.36 : x
  2. Step 2: Convert to fraction form
    420,389.65/580,150.05 = 229,415.36/x
  3. Step 3: Cross multiply
    420,389.65x = 580,150.05 × 229,415.36
  4. Step 4: Simplify right side
    420,389.65x = 133,095,332,574.77
  5. Step 5: Solve for x
    x = 133,095,332,574.77/420,389.65
  6. Step 6: Final answer
    x = 316,599.93

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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.