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Finding the Fourth Proportional to 478,634.40, 718,048.80 and 163,123.20

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Solution

The fourth proportional to 478,634.40, 718,048.80 and 163,123.20 is: 244,717.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,634.40 : 718,048.80 = 163,123.20 : x
  2. Step 2: Convert to fraction form
    478,634.40/718,048.80 = 163,123.20/x
  3. Step 3: Cross multiply
    478,634.40x = 718,048.80 × 163,123.20
  4. Step 4: Simplify right side
    478,634.40x = 117,130,418,012.16
  5. Step 5: Solve for x
    x = 117,130,418,012.16/478,634.40
  6. Step 6: Final answer
    x = 244,717.93

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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.