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Finding the Fourth Proportional to 260,152.90, 390,307.95 and 123,480.90

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Solution

The fourth proportional to 260,152.90, 390,307.95 and 123,480.90 is: 185,258.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,152.90 : 390,307.95 = 123,480.90 : x
  2. Step 2: Convert to fraction form
    260,152.90/390,307.95 = 123,480.90/x
  3. Step 3: Cross multiply
    260,152.90x = 390,307.95 × 123,480.90
  4. Step 4: Simplify right side
    260,152.90x = 48,195,574,991.62
  5. Step 5: Solve for x
    x = 48,195,574,991.62/260,152.90
  6. Step 6: Final answer
    x = 185,258.65

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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.