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Finding the Fourth Proportional to 260,838.40, 391,430.40 and 148,518.40

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Solution

The fourth proportional to 260,838.40, 391,430.40 and 148,518.40 is: 222,875.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,838.40 : 391,430.40 = 148,518.40 : x
  2. Step 2: Convert to fraction form
    260,838.40/391,430.40 = 148,518.40/x
  3. Step 3: Cross multiply
    260,838.40x = 391,430.40 × 148,518.40
  4. Step 4: Simplify right side
    260,838.40x = 58,134,616,719.36
  5. Step 5: Solve for x
    x = 58,134,616,719.36/260,838.40
  6. Step 6: Final answer
    x = 222,875.99

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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.