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Finding the Fourth Proportional to 258,012.60, 387,018.90 and 156,973.20

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Solution

The fourth proportional to 258,012.60, 387,018.90 and 156,973.20 is: 235,459.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,012.60 : 387,018.90 = 156,973.20 : x
  2. Step 2: Convert to fraction form
    258,012.60/387,018.90 = 156,973.20/x
  3. Step 3: Cross multiply
    258,012.60x = 387,018.90 × 156,973.20
  4. Step 4: Simplify right side
    258,012.60x = 60,751,595,193.48
  5. Step 5: Solve for x
    x = 60,751,595,193.48/258,012.60
  6. Step 6: Final answer
    x = 235,459.80

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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.