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Finding the Fourth Proportional to 520,069.60, 717,774.78 and 305,306.20

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Solution

The fourth proportional to 520,069.60, 717,774.78 and 305,306.20 is: 421,368.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,069.60 : 717,774.78 = 305,306.20 : x
  2. Step 2: Convert to fraction form
    520,069.60/717,774.78 = 305,306.20/x
  3. Step 3: Cross multiply
    520,069.60x = 717,774.78 × 305,306.20
  4. Step 4: Simplify right side
    520,069.60x = 219,141,090,537.64
  5. Step 5: Solve for x
    x = 219,141,090,537.64/520,069.60
  6. Step 6: Final answer
    x = 421,368.78

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.