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Finding the Fourth Proportional to 583,709.30, 805,395.79 and 354,387.16

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Solution

The fourth proportional to 583,709.30, 805,395.79 and 354,387.16 is: 488,979.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    583,709.30 : 805,395.79 = 354,387.16 : x
  2. Step 2: Convert to fraction form
    583,709.30/805,395.79 = 354,387.16/x
  3. Step 3: Cross multiply
    583,709.30x = 805,395.79 × 354,387.16
  4. Step 4: Simplify right side
    583,709.30x = 285,421,926,694.06
  5. Step 5: Solve for x
    x = 285,421,926,694.06/583,709.30
  6. Step 6: Final answer
    x = 488,979.58

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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.