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Finding the Fourth Proportional to 405,275.28, 607,925.22 and 139,031.94

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Solution

The fourth proportional to 405,275.28, 607,925.22 and 139,031.94 is: 208,552.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,275.28 : 607,925.22 = 139,031.94 : x
  2. Step 2: Convert to fraction form
    405,275.28/607,925.22 = 139,031.94/x
  3. Step 3: Cross multiply
    405,275.28x = 607,925.22 × 139,031.94
  4. Step 4: Simplify right side
    405,275.28x = 84,521,022,711.53
  5. Step 5: Solve for x
    x = 84,521,022,711.53/405,275.28
  6. Step 6: Final answer
    x = 208,552.13

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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.