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Finding the Fourth Proportional to 612,659.90, 845,421.66 and 340,728.32

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Solution

The fourth proportional to 612,659.90, 845,421.66 and 340,728.32 is: 470,177.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,659.90 : 845,421.66 = 340,728.32 : x
  2. Step 2: Convert to fraction form
    612,659.90/845,421.66 = 340,728.32/x
  3. Step 3: Cross multiply
    612,659.90x = 845,421.66 × 340,728.32
  4. Step 4: Simplify right side
    612,659.90x = 288,059,101,903.41
  5. Step 5: Solve for x
    x = 288,059,101,903.41/612,659.90
  6. Step 6: Final answer
    x = 470,177.83

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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.