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Finding the Fourth Proportional to 310,915.80, 429,063.78 and 176,779.80

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Solution

The fourth proportional to 310,915.80, 429,063.78 and 176,779.80 is: 243,956.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,915.80 : 429,063.78 = 176,779.80 : x
  2. Step 2: Convert to fraction form
    310,915.80/429,063.78 = 176,779.80/x
  3. Step 3: Cross multiply
    310,915.80x = 429,063.78 × 176,779.80
  4. Step 4: Simplify right side
    310,915.80x = 75,849,809,215.64
  5. Step 5: Solve for x
    x = 75,849,809,215.64/310,915.80
  6. Step 6: Final answer
    x = 243,956.11

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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.