Home / 467,905.88-645,124.16-390,492.43

Finding the Fourth Proportional to 467,905.88, 645,124.16 and 390,492.43

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Solution

The fourth proportional to 467,905.88, 645,124.16 and 390,492.43 is: 538,390.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    467,905.88 : 645,124.16 = 390,492.43 : x
  2. Step 2: Convert to fraction form
    467,905.88/645,124.16 = 390,492.43/x
  3. Step 3: Cross multiply
    467,905.88x = 645,124.16 × 390,492.43
  4. Step 4: Simplify right side
    467,905.88x = 251,916,100,253.53
  5. Step 5: Solve for x
    x = 251,916,100,253.53/467,905.88
  6. Step 6: Final answer
    x = 538,390.54

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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.