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Finding the Fourth Proportional to 612,658.90, 845,420.28 and 340,727.32

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Solution

The fourth proportional to 612,658.90, 845,420.28 and 340,727.32 is: 470,176.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,658.90 : 845,420.28 = 340,727.32 : x
  2. Step 2: Convert to fraction form
    612,658.90/845,420.28 = 340,727.32/x
  3. Step 3: Cross multiply
    612,658.90x = 845,420.28 × 340,727.32
  4. Step 4: Simplify right side
    612,658.90x = 288,057,786,278.05
  5. Step 5: Solve for x
    x = 288,057,786,278.05/612,658.90
  6. Step 6: Final answer
    x = 470,176.45

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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.