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Finding the Fourth Proportional to 386,444.40, 579,666.60 and 186,860.40

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Solution

The fourth proportional to 386,444.40, 579,666.60 and 186,860.40 is: 280,290.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,444.40 : 579,666.60 = 186,860.40 : x
  2. Step 2: Convert to fraction form
    386,444.40/579,666.60 = 186,860.40/x
  3. Step 3: Cross multiply
    386,444.40x = 579,666.60 × 186,860.40
  4. Step 4: Simplify right side
    386,444.40x = 108,316,732,742.64
  5. Step 5: Solve for x
    x = 108,316,732,742.64/386,444.40
  6. Step 6: Final answer
    x = 280,290.60

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1.5x scale

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.