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Finding the Fourth Proportional to 549,056.90, 821,981.55 and 391,592.90

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Solution

The fourth proportional to 549,056.90, 821,981.55 and 391,592.90 is: 586,245.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    549,056.90 : 821,981.55 = 391,592.90 : x
  2. Step 2: Convert to fraction form
    549,056.90/821,981.55 = 391,592.90/x
  3. Step 3: Cross multiply
    549,056.90x = 821,981.55 × 391,592.90
  4. Step 4: Simplify right side
    549,056.90x = 321,882,138,911.00
  5. Step 5: Solve for x
    x = 321,882,138,911.00/549,056.90
  6. Step 6: Final answer
    x = 586,245.50

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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.