Home / 405,239.71-607,316.19-315,390.91

Finding the Fourth Proportional to 405,239.71, 607,316.19 and 315,390.91

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Solution

The fourth proportional to 405,239.71, 607,316.19 and 315,390.91 is: 472,663.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,239.71 : 607,316.19 = 315,390.91 : x
  2. Step 2: Convert to fraction form
    405,239.71/607,316.19 = 315,390.91/x
  3. Step 3: Cross multiply
    405,239.71x = 607,316.19 × 315,390.91
  4. Step 4: Simplify right side
    405,239.71x = 191,542,005,821.83
  5. Step 5: Solve for x
    x = 191,542,005,821.83/405,239.71
  6. Step 6: Final answer
    x = 472,663.47

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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.