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Finding the Fourth Proportional to 620,409.80, 928,646.40 and 620,409.80

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Solution

The fourth proportional to 620,409.80, 928,646.40 and 620,409.80 is: 928,646.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,409.80 : 928,646.40 = 620,409.80 : x
  2. Step 2: Convert to fraction form
    620,409.80/928,646.40 = 620,409.80/x
  3. Step 3: Cross multiply
    620,409.80x = 928,646.40 × 620,409.80
  4. Step 4: Simplify right side
    620,409.80x = 576,141,327,294.72
  5. Step 5: Solve for x
    x = 576,141,327,294.72/620,409.80
  6. Step 6: Final answer
    x = 928,646.40

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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.