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Finding the Fourth Proportional to 260,460.60, 390,690.90 and 142,362.60

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Solution

The fourth proportional to 260,460.60, 390,690.90 and 142,362.60 is: 213,543.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,460.60 : 390,690.90 = 142,362.60 : x
  2. Step 2: Convert to fraction form
    260,460.60/390,690.90 = 142,362.60/x
  3. Step 3: Cross multiply
    260,460.60x = 390,690.90 × 142,362.60
  4. Step 4: Simplify right side
    260,460.60x = 55,619,772,320.34
  5. Step 5: Solve for x
    x = 55,619,772,320.34/260,460.60
  6. Step 6: Final answer
    x = 213,543.90

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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.