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Finding the Fourth Proportional to 346,986.40, 520,479.60 and 84,330.40

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Solution

The fourth proportional to 346,986.40, 520,479.60 and 84,330.40 is: 126,495.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,986.40 : 520,479.60 = 84,330.40 : x
  2. Step 2: Convert to fraction form
    346,986.40/520,479.60 = 84,330.40/x
  3. Step 3: Cross multiply
    346,986.40x = 520,479.60 × 84,330.40
  4. Step 4: Simplify right side
    346,986.40x = 43,892,252,859.84
  5. Step 5: Solve for x
    x = 43,892,252,859.84/346,986.40
  6. Step 6: Final answer
    x = 126,495.60

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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.