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Finding the Fourth Proportional to 720,519.18, 993,800.79 and 505,707.18

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Solution

The fourth proportional to 720,519.18, 993,800.79 and 505,707.18 is: 697,513.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,519.18 : 993,800.79 = 505,707.18 : x
  2. Step 2: Convert to fraction form
    720,519.18/993,800.79 = 505,707.18/x
  3. Step 3: Cross multiply
    720,519.18x = 993,800.79 × 505,707.18
  4. Step 4: Simplify right side
    720,519.18x = 502,572,194,992.67
  5. Step 5: Solve for x
    x = 502,572,194,992.67/720,519.18
  6. Step 6: Final answer
    x = 697,513.97

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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.