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Finding the Fourth Proportional to 713,788.89, 985,030.08 and 391,501.63

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Solution

The fourth proportional to 713,788.89, 985,030.08 and 391,501.63 is: 540,273.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,788.89 : 985,030.08 = 391,501.63 : x
  2. Step 2: Convert to fraction form
    713,788.89/985,030.08 = 391,501.63/x
  3. Step 3: Cross multiply
    713,788.89x = 985,030.08 × 391,501.63
  4. Step 4: Simplify right side
    713,788.89x = 385,640,881,919.03
  5. Step 5: Solve for x
    x = 385,640,881,919.03/713,788.89
  6. Step 6: Final answer
    x = 540,273.02

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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.