Home / 260,256.10-390,384.15-155,280.10

Finding the Fourth Proportional to 260,256.10, 390,384.15 and 155,280.10

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Solution

The fourth proportional to 260,256.10, 390,384.15 and 155,280.10 is: 232,920.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,256.10 : 390,384.15 = 155,280.10 : x
  2. Step 2: Convert to fraction form
    260,256.10/390,384.15 = 155,280.10/x
  3. Step 3: Cross multiply
    260,256.10x = 390,384.15 × 155,280.10
  4. Step 4: Simplify right side
    260,256.10x = 60,618,889,850.42
  5. Step 5: Solve for x
    x = 60,618,889,850.42/260,256.10
  6. Step 6: Final answer
    x = 232,920.15

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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.