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Finding the Fourth Proportional to 478,868.90, 718,400.55 and 163,357.70

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Solution

The fourth proportional to 478,868.90, 718,400.55 and 163,357.70 is: 245,069.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,868.90 : 718,400.55 = 163,357.70 : x
  2. Step 2: Convert to fraction form
    478,868.90/718,400.55 = 163,357.70/x
  3. Step 3: Cross multiply
    478,868.90x = 718,400.55 × 163,357.70
  4. Step 4: Simplify right side
    478,868.90x = 117,356,261,526.74
  5. Step 5: Solve for x
    x = 117,356,261,526.74/478,868.90
  6. Step 6: Final answer
    x = 245,069.71

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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.