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Finding the Fourth Proportional to 391,032.08, 539,346 and 358,870.60

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Solution

The fourth proportional to 391,032.08, 539,346 and 358,870.60 is: 494,986.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,032.08 : 539,346 = 358,870.60 : x
  2. Step 2: Convert to fraction form
    391,032.08/539,346 = 358,870.60/x
  3. Step 3: Cross multiply
    391,032.08x = 539,346 × 358,870.60
  4. Step 4: Simplify right side
    391,032.08x = 193,555,422,627.60
  5. Step 5: Solve for x
    x = 193,555,422,627.60/391,032.08
  6. Step 6: Final answer
    x = 494,986.04

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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.