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Finding the Fourth Proportional to 458,564.80, 687,847.20 and 346,590.40

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Solution

The fourth proportional to 458,564.80, 687,847.20 and 346,590.40 is: 519,885.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,564.80 : 687,847.20 = 346,590.40 : x
  2. Step 2: Convert to fraction form
    458,564.80/687,847.20 = 346,590.40/x
  3. Step 3: Cross multiply
    458,564.80x = 687,847.20 × 346,590.40
  4. Step 4: Simplify right side
    458,564.80x = 238,401,236,186.88
  5. Step 5: Solve for x
    x = 238,401,236,186.88/458,564.80
  6. Step 6: Final answer
    x = 519,885.60

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.