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Finding the Fourth Proportional to 720,523.68, 993,807 and 505,711.68

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Solution

The fourth proportional to 720,523.68, 993,807 and 505,711.68 is: 697,520.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,523.68 : 993,807 = 505,711.68 : x
  2. Step 2: Convert to fraction form
    720,523.68/993,807 = 505,711.68/x
  3. Step 3: Cross multiply
    720,523.68x = 993,807 × 505,711.68
  4. Step 4: Simplify right side
    720,523.68x = 502,579,807,565.76
  5. Step 5: Solve for x
    x = 502,579,807,565.76/720,523.68
  6. Step 6: Final answer
    x = 697,520.18

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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.