Home / 640,501.76-883,938.30-354,015.74

Finding the Fourth Proportional to 640,501.76, 883,938.30 and 354,015.74

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Solution

The fourth proportional to 640,501.76, 883,938.30 and 354,015.74 is: 488,567.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,501.76 : 883,938.30 = 354,015.74 : x
  2. Step 2: Convert to fraction form
    640,501.76/883,938.30 = 354,015.74/x
  3. Step 3: Cross multiply
    640,501.76x = 883,938.30 × 354,015.74
  4. Step 4: Simplify right side
    640,501.76x = 312,928,071,388.84
  5. Step 5: Solve for x
    x = 312,928,071,388.84/640,501.76
  6. Step 6: Final answer
    x = 488,567.07

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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.