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Finding the Fourth Proportional to 714,528.05, 986,023.20 and 404,423.98

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Solution

The fourth proportional to 714,528.05, 986,023.20 and 404,423.98 is: 558,090.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,528.05 : 986,023.20 = 404,423.98 : x
  2. Step 2: Convert to fraction form
    714,528.05/986,023.20 = 404,423.98/x
  3. Step 3: Cross multiply
    714,528.05x = 986,023.20 × 404,423.98
  4. Step 4: Simplify right side
    714,528.05x = 398,771,424,894.22
  5. Step 5: Solve for x
    x = 398,771,424,894.22/714,528.05
  6. Step 6: Final answer
    x = 558,090.65

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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.