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Finding the Fourth Proportional to 620,200.80, 929,134.80 and 319,658.40

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Solution

The fourth proportional to 620,200.80, 929,134.80 and 319,658.40 is: 478,886.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,200.80 : 929,134.80 = 319,658.40 : x
  2. Step 2: Convert to fraction form
    620,200.80/929,134.80 = 319,658.40/x
  3. Step 3: Cross multiply
    620,200.80x = 929,134.80 × 319,658.40
  4. Step 4: Simplify right side
    620,200.80x = 297,005,743,552.32
  5. Step 5: Solve for x
    x = 297,005,743,552.32/620,200.80
  6. Step 6: Final answer
    x = 478,886.42

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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.