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Finding the Fourth Proportional to 260,036.70, 390,055.05 and 171,390.30

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Solution

The fourth proportional to 260,036.70, 390,055.05 and 171,390.30 is: 257,085.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,036.70 : 390,055.05 = 171,390.30 : x
  2. Step 2: Convert to fraction form
    260,036.70/390,055.05 = 171,390.30/x
  3. Step 3: Cross multiply
    260,036.70x = 390,055.05 × 171,390.30
  4. Step 4: Simplify right side
    260,036.70x = 66,851,652,036.02
  5. Step 5: Solve for x
    x = 66,851,652,036.02/260,036.70
  6. Step 6: Final answer
    x = 257,085.45

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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.