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Finding the Fourth Proportional to 520,091.20, 780,136.80 and 360,658.90

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Solution

The fourth proportional to 520,091.20, 780,136.80 and 360,658.90 is: 540,988.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,091.20 : 780,136.80 = 360,658.90 : x
  2. Step 2: Convert to fraction form
    520,091.20/780,136.80 = 360,658.90/x
  3. Step 3: Cross multiply
    520,091.20x = 780,136.80 × 360,658.90
  4. Step 4: Simplify right side
    520,091.20x = 281,363,280,137.52
  5. Step 5: Solve for x
    x = 281,363,280,137.52/520,091.20
  6. Step 6: Final answer
    x = 540,988.35

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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.