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Finding the Fourth Proportional to 328,870.20, 493,535.70 and 210,828.60

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Solution

The fourth proportional to 328,870.20, 493,535.70 and 210,828.60 is: 316,390.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,870.20 : 493,535.70 = 210,828.60 : x
  2. Step 2: Convert to fraction form
    328,870.20/493,535.70 = 210,828.60/x
  3. Step 3: Cross multiply
    328,870.20x = 493,535.70 × 210,828.60
  4. Step 4: Simplify right side
    328,870.20x = 104,051,440,681.02
  5. Step 5: Solve for x
    x = 104,051,440,681.02/328,870.20
  6. Step 6: Final answer
    x = 316,390.60

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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.