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Finding the Fourth Proportional to 520,616.40, 780,924.60 and 310,491.60

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Solution

The fourth proportional to 520,616.40, 780,924.60 and 310,491.60 is: 465,737.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,616.40 : 780,924.60 = 310,491.60 : x
  2. Step 2: Convert to fraction form
    520,616.40/780,924.60 = 310,491.60/x
  3. Step 3: Cross multiply
    520,616.40x = 780,924.60 × 310,491.60
  4. Step 4: Simplify right side
    520,616.40x = 242,470,528,533.36
  5. Step 5: Solve for x
    x = 242,470,528,533.36/520,616.40
  6. Step 6: Final answer
    x = 465,737.40

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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.