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Finding the Fourth Proportional to 553,272.72, 762,598.48 and 391,920.72

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Solution

The fourth proportional to 553,272.72, 762,598.48 and 391,920.72 is: 540,200.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,272.72 : 762,598.48 = 391,920.72 : x
  2. Step 2: Convert to fraction form
    553,272.72/762,598.48 = 391,920.72/x
  3. Step 3: Cross multiply
    553,272.72x = 762,598.48 × 391,920.72
  4. Step 4: Simplify right side
    553,272.72x = 298,878,145,352.51
  5. Step 5: Solve for x
    x = 298,878,145,352.51/553,272.72
  6. Step 6: Final answer
    x = 540,200.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.