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Finding the Fourth Proportional to 260,283.20, 390,424.80 and 155,220.80

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Solution

The fourth proportional to 260,283.20, 390,424.80 and 155,220.80 is: 232,831.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,283.20 : 390,424.80 = 155,220.80 : x
  2. Step 2: Convert to fraction form
    260,283.20/390,424.80 = 155,220.80/x
  3. Step 3: Cross multiply
    260,283.20x = 390,424.80 × 155,220.80
  4. Step 4: Simplify right side
    260,283.20x = 60,602,049,795.84
  5. Step 5: Solve for x
    x = 60,602,049,795.84/260,283.20
  6. Step 6: Final answer
    x = 232,831.20

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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.