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Finding the Fourth Proportional to 458,466.40, 687,116.40 and 221,298.40

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Solution

The fourth proportional to 458,466.40, 687,116.40 and 221,298.40 is: 331,666.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    458,466.40 : 687,116.40 = 221,298.40 : x
  2. Step 2: Convert to fraction form
    458,466.40/687,116.40 = 221,298.40/x
  3. Step 3: Cross multiply
    458,466.40x = 687,116.40 × 221,298.40
  4. Step 4: Simplify right side
    458,466.40x = 152,057,759,933.76
  5. Step 5: Solve for x
    x = 152,057,759,933.76/458,466.40
  6. Step 6: Final answer
    x = 331,666.09

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1.5x scale

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.