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Finding the Fourth Proportional to 520,078.15, 780,117.23 and 520,078.15

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Solution

The fourth proportional to 520,078.15, 780,117.23 and 520,078.15 is: 780,117.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,078.15 : 780,117.23 = 520,078.15 : x
  2. Step 2: Convert to fraction form
    520,078.15/780,117.23 = 520,078.15/x
  3. Step 3: Cross multiply
    520,078.15x = 780,117.23 × 520,078.15
  4. Step 4: Simplify right side
    520,078.15x = 405,721,925,761.53
  5. Step 5: Solve for x
    x = 405,721,925,761.53/520,078.15
  6. Step 6: Final answer
    x = 780,117.23

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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.