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Finding the Fourth Proportional to 638,569.20, 958,291.20 and 354,259.20

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Solution

The fourth proportional to 638,569.20, 958,291.20 and 354,259.20 is: 531,631.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,569.20 : 958,291.20 = 354,259.20 : x
  2. Step 2: Convert to fraction form
    638,569.20/958,291.20 = 354,259.20/x
  3. Step 3: Cross multiply
    638,569.20x = 958,291.20 × 354,259.20
  4. Step 4: Simplify right side
    638,569.20x = 339,483,473,879.04
  5. Step 5: Solve for x
    x = 339,483,473,879.04/638,569.20
  6. Step 6: Final answer
    x = 531,631.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.