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Finding the Fourth Proportional to 720,132.50, 993,782.85 and 418,345.94

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Solution

The fourth proportional to 720,132.50, 993,782.85 and 418,345.94 is: 577,317.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,132.50 : 993,782.85 = 418,345.94 : x
  2. Step 2: Convert to fraction form
    720,132.50/993,782.85 = 418,345.94/x
  3. Step 3: Cross multiply
    720,132.50x = 993,782.85 × 418,345.94
  4. Step 4: Simplify right side
    720,132.50x = 415,745,020,539.13
  5. Step 5: Solve for x
    x = 415,745,020,539.13/720,132.50
  6. Step 6: Final answer
    x = 577,317.40

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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.