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Finding the Fourth Proportional to 720,512.34, 994,358.51 and 398,215.52

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Solution

The fourth proportional to 720,512.34, 994,358.51 and 398,215.52 is: 549,565.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,512.34 : 994,358.51 = 398,215.52 : x
  2. Step 2: Convert to fraction form
    720,512.34/994,358.51 = 398,215.52/x
  3. Step 3: Cross multiply
    720,512.34x = 994,358.51 × 398,215.52
  4. Step 4: Simplify right side
    720,512.34x = 395,968,994,607.51
  5. Step 5: Solve for x
    x = 395,968,994,607.51/720,512.34
  6. Step 6: Final answer
    x = 549,565.88

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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.