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Finding the Fourth Proportional to 714,892.10, 986,547.52 and 388,202.20

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Solution

The fourth proportional to 714,892.10, 986,547.52 and 388,202.20 is: 535,717.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    714,892.10 : 986,547.52 = 388,202.20 : x
  2. Step 2: Convert to fraction form
    714,892.10/986,547.52 = 388,202.20/x
  3. Step 3: Cross multiply
    714,892.10x = 986,547.52 × 388,202.20
  4. Step 4: Simplify right side
    714,892.10x = 382,979,917,668.54
  5. Step 5: Solve for x
    x = 382,979,917,668.54/714,892.10
  6. Step 6: Final answer
    x = 535,717.09

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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.