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Finding the Fourth Proportional to 520,087.90, 778,965.45 and 520,087.90

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Solution

The fourth proportional to 520,087.90, 778,965.45 and 520,087.90 is: 778,965.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,087.90 : 778,965.45 = 520,087.90 : x
  2. Step 2: Convert to fraction form
    520,087.90/778,965.45 = 520,087.90/x
  3. Step 3: Cross multiply
    520,087.90x = 778,965.45 × 520,087.90
  4. Step 4: Simplify right side
    520,087.90x = 405,130,505,063.06
  5. Step 5: Solve for x
    x = 405,130,505,063.06/520,087.90
  6. Step 6: Final answer
    x = 778,965.45

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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.