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Finding the Fourth Proportional to 720,172.56, 993,820.68 and 397,913.52

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Solution

The fourth proportional to 720,172.56, 993,820.68 and 397,913.52 is: 549,111.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,172.56 : 993,820.68 = 397,913.52 : x
  2. Step 2: Convert to fraction form
    720,172.56/993,820.68 = 397,913.52/x
  3. Step 3: Cross multiply
    720,172.56x = 993,820.68 × 397,913.52
  4. Step 4: Simplify right side
    720,172.56x = 395,454,685,027.59
  5. Step 5: Solve for x
    x = 395,454,685,027.59/720,172.56
  6. Step 6: Final answer
    x = 549,111.01

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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.