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Finding the Fourth Proportional to 640,086.12, 883,345.68 and 368,154.08

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Solution

The fourth proportional to 640,086.12, 883,345.68 and 368,154.08 is: 508,068.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,086.12 : 883,345.68 = 368,154.08 : x
  2. Step 2: Convert to fraction form
    640,086.12/883,345.68 = 368,154.08/x
  3. Step 3: Cross multiply
    640,086.12x = 883,345.68 × 368,154.08
  4. Step 4: Simplify right side
    640,086.12x = 325,207,316,142.37
  5. Step 5: Solve for x
    x = 325,207,316,142.37/640,086.12
  6. Step 6: Final answer
    x = 508,068.06

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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.