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Finding the Fourth Proportional to 546,004.80, 820,756.80 and 389,318.40

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Solution

The fourth proportional to 546,004.80, 820,756.80 and 389,318.40 is: 585,225.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    546,004.80 : 820,756.80 = 389,318.40 : x
  2. Step 2: Convert to fraction form
    546,004.80/820,756.80 = 389,318.40/x
  3. Step 3: Cross multiply
    546,004.80x = 820,756.80 × 389,318.40
  4. Step 4: Simplify right side
    546,004.80x = 319,535,724,165.12
  5. Step 5: Solve for x
    x = 319,535,724,165.12/546,004.80
  6. Step 6: Final answer
    x = 585,225.12

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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.