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Finding the Fourth Proportional to 520,039.80, 780,642.90 and 402,233.40

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Solution

The fourth proportional to 520,039.80, 780,642.90 and 402,233.40 is: 603,801.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,039.80 : 780,642.90 = 402,233.40 : x
  2. Step 2: Convert to fraction form
    520,039.80/780,642.90 = 402,233.40/x
  3. Step 3: Cross multiply
    520,039.80x = 780,642.90 × 402,233.40
  4. Step 4: Simplify right side
    520,039.80x = 314,000,647,852.86
  5. Step 5: Solve for x
    x = 314,000,647,852.86/520,039.80
  6. Step 6: Final answer
    x = 603,801.19

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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.