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Finding the Fourth Proportional to 520,054.60, 780,081.90 and 488,561.80

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Solution

The fourth proportional to 520,054.60, 780,081.90 and 488,561.80 is: 732,842.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,054.60 : 780,081.90 = 488,561.80 : x
  2. Step 2: Convert to fraction form
    520,054.60/780,081.90 = 488,561.80/x
  3. Step 3: Cross multiply
    520,054.60x = 780,081.90 × 488,561.80
  4. Step 4: Simplify right side
    520,054.60x = 381,118,217,211.42
  5. Step 5: Solve for x
    x = 381,118,217,211.42/520,054.60
  6. Step 6: Final answer
    x = 732,842.70

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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.