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Finding the Fourth Proportional to 720,130.50, 993,780.09 and 418,343.94

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Solution

The fourth proportional to 720,130.50, 993,780.09 and 418,343.94 is: 577,314.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,130.50 : 993,780.09 = 418,343.94 : x
  2. Step 2: Convert to fraction form
    720,130.50/993,780.09 = 418,343.94/x
  3. Step 3: Cross multiply
    720,130.50x = 993,780.09 × 418,343.94
  4. Step 4: Simplify right side
    720,130.50x = 415,741,878,344.16
  5. Step 5: Solve for x
    x = 415,741,878,344.16/720,130.50
  6. Step 6: Final answer
    x = 577,314.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.