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Finding the Fourth Proportional to 260,013.60, 390,020.40 and 141,915.60

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Solution

The fourth proportional to 260,013.60, 390,020.40 and 141,915.60 is: 212,873.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,013.60 : 390,020.40 = 141,915.60 : x
  2. Step 2: Convert to fraction form
    260,013.60/390,020.40 = 141,915.60/x
  3. Step 3: Cross multiply
    260,013.60x = 390,020.40 × 141,915.60
  4. Step 4: Simplify right side
    260,013.60x = 55,349,979,078.24
  5. Step 5: Solve for x
    x = 55,349,979,078.24/260,013.60
  6. Step 6: Final answer
    x = 212,873.40

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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.