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Finding the Fourth Proportional to 549,025.60, 758,128.15 and 345,415.90

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Solution

The fourth proportional to 549,025.60, 758,128.15 and 345,415.90 is: 476,971.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    549,025.60 : 758,128.15 = 345,415.90 : x
  2. Step 2: Convert to fraction form
    549,025.60/758,128.15 = 345,415.90/x
  3. Step 3: Cross multiply
    549,025.60x = 758,128.15 × 345,415.90
  4. Step 4: Simplify right side
    549,025.60x = 261,869,516,044.77
  5. Step 5: Solve for x
    x = 261,869,516,044.77/549,025.60
  6. Step 6: Final answer
    x = 476,971.42

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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.