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Finding the Fourth Proportional to 520,329.83, 780,139.59 and 277,207.25

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Solution

The fourth proportional to 520,329.83, 780,139.59 and 277,207.25 is: 415,621.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,329.83 : 780,139.59 = 277,207.25 : x
  2. Step 2: Convert to fraction form
    520,329.83/780,139.59 = 277,207.25/x
  3. Step 3: Cross multiply
    520,329.83x = 780,139.59 × 277,207.25
  4. Step 4: Simplify right side
    520,329.83x = 216,260,345,419.80
  5. Step 5: Solve for x
    x = 216,260,345,419.80/520,329.83
  6. Step 6: Final answer
    x = 415,621.66

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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.