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Finding the Fourth Proportional to 386,084.80, 578,090.40 and 386,084.80

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Solution

The fourth proportional to 386,084.80, 578,090.40 and 386,084.80 is: 578,090.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,084.80 : 578,090.40 = 386,084.80 : x
  2. Step 2: Convert to fraction form
    386,084.80/578,090.40 = 386,084.80/x
  3. Step 3: Cross multiply
    386,084.80x = 578,090.40 × 386,084.80
  4. Step 4: Simplify right side
    386,084.80x = 223,191,916,465.92
  5. Step 5: Solve for x
    x = 223,191,916,465.92/386,084.80
  6. Step 6: Final answer
    x = 578,090.40

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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.