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Finding the Fourth Proportional to 260,434.40, 390,068.40 and 155,458.40

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Solution

The fourth proportional to 260,434.40, 390,068.40 and 155,458.40 is: 232,839.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,434.40 : 390,068.40 = 155,458.40 : x
  2. Step 2: Convert to fraction form
    260,434.40/390,068.40 = 155,458.40/x
  3. Step 3: Cross multiply
    260,434.40x = 390,068.40 × 155,458.40
  4. Step 4: Simplify right side
    260,434.40x = 60,639,409,354.56
  5. Step 5: Solve for x
    x = 60,639,409,354.56/260,434.40
  6. Step 6: Final answer
    x = 232,839.48

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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.