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Finding the Fourth Proportional to 714,055.34, 985,363.70 and 391,758.78

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Solution

The fourth proportional to 714,055.34, 985,363.70 and 391,758.78 is: 540,609.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,055.34 : 985,363.70 = 391,758.78 : x
  2. Step 2: Convert to fraction form
    714,055.34/985,363.70 = 391,758.78/x
  3. Step 3: Cross multiply
    714,055.34x = 985,363.70 × 391,758.78
  4. Step 4: Simplify right side
    714,055.34x = 386,024,880,968.29
  5. Step 5: Solve for x
    x = 386,024,880,968.29/714,055.34
  6. Step 6: Final answer
    x = 540,609.19

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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.