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Finding the Fourth Proportional to 520,290.60, 780,880.32 and 370,896.36

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Solution

The fourth proportional to 520,290.60, 780,880.32 and 370,896.36 is: 556,661.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,290.60 : 780,880.32 = 370,896.36 : x
  2. Step 2: Convert to fraction form
    520,290.60/780,880.32 = 370,896.36/x
  3. Step 3: Cross multiply
    520,290.60x = 780,880.32 × 370,896.36
  4. Step 4: Simplify right side
    520,290.60x = 289,625,668,283.64
  5. Step 5: Solve for x
    x = 289,625,668,283.64/520,290.60
  6. Step 6: Final answer
    x = 556,661.35

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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.