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Finding the Fourth Proportional to 260,341.20, 390,511.80 and 155,278.80

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Solution

The fourth proportional to 260,341.20, 390,511.80 and 155,278.80 is: 232,918.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,341.20 : 390,511.80 = 155,278.80 : x
  2. Step 2: Convert to fraction form
    260,341.20/390,511.80 = 155,278.80/x
  3. Step 3: Cross multiply
    260,341.20x = 390,511.80 × 155,278.80
  4. Step 4: Simplify right side
    260,341.20x = 60,638,203,689.84
  5. Step 5: Solve for x
    x = 60,638,203,689.84/260,341.20
  6. Step 6: Final answer
    x = 232,918.20

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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.