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Finding the Fourth Proportional to 319,307.50, 478,961.25 and 129,870.94

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Solution

The fourth proportional to 319,307.50, 478,961.25 and 129,870.94 is: 194,806.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,307.50 : 478,961.25 = 129,870.94 : x
  2. Step 2: Convert to fraction form
    319,307.50/478,961.25 = 129,870.94/x
  3. Step 3: Cross multiply
    319,307.50x = 478,961.25 × 129,870.94
  4. Step 4: Simplify right side
    319,307.50x = 62,203,145,366.27
  5. Step 5: Solve for x
    x = 62,203,145,366.27/319,307.50
  6. Step 6: Final answer
    x = 194,806.40

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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.