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Finding the Fourth Proportional to 640,298.52, 883,535.04 and 353,779.38

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Solution

The fourth proportional to 640,298.52, 883,535.04 and 353,779.38 is: 488,173.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,298.52 : 883,535.04 = 353,779.38 : x
  2. Step 2: Convert to fraction form
    640,298.52/883,535.04 = 353,779.38/x
  3. Step 3: Cross multiply
    640,298.52x = 883,535.04 × 353,779.38
  4. Step 4: Simplify right side
    640,298.52x = 312,576,478,659.48
  5. Step 5: Solve for x
    x = 312,576,478,659.48/640,298.52
  6. Step 6: Final answer
    x = 488,173.05

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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.