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Finding the Fourth Proportional to 260,417.60, 390,626.40 and 155,441.60

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Solution

The fourth proportional to 260,417.60, 390,626.40 and 155,441.60 is: 233,162.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,417.60 : 390,626.40 = 155,441.60 : x
  2. Step 2: Convert to fraction form
    260,417.60/390,626.40 = 155,441.60/x
  3. Step 3: Cross multiply
    260,417.60x = 390,626.40 × 155,441.60
  4. Step 4: Simplify right side
    260,417.60x = 60,719,592,618.24
  5. Step 5: Solve for x
    x = 60,719,592,618.24/260,417.60
  6. Step 6: Final answer
    x = 233,162.40

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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.