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Finding the Fourth Proportional to 260,038.60, 390,070.70 and 135,622.60

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Solution

The fourth proportional to 260,038.60, 390,070.70 and 135,622.60 is: 203,440.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,038.60 : 390,070.70 = 135,622.60 : x
  2. Step 2: Convert to fraction form
    260,038.60/390,070.70 = 135,622.60/x
  3. Step 3: Cross multiply
    260,038.60x = 390,070.70 × 135,622.60
  4. Step 4: Simplify right side
    260,038.60x = 52,902,402,517.82
  5. Step 5: Solve for x
    x = 52,902,402,517.82/260,038.60
  6. Step 6: Final answer
    x = 203,440.58

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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.