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Finding the Fourth Proportional to 402,895.20, 604,808.40 and 216,271.20

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Solution

The fourth proportional to 402,895.20, 604,808.40 and 216,271.20 is: 324,656.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,895.20 : 604,808.40 = 216,271.20 : x
  2. Step 2: Convert to fraction form
    402,895.20/604,808.40 = 216,271.20/x
  3. Step 3: Cross multiply
    402,895.20x = 604,808.40 × 216,271.20
  4. Step 4: Simplify right side
    402,895.20x = 130,802,638,438.08
  5. Step 5: Solve for x
    x = 130,802,638,438.08/402,895.20
  6. Step 6: Final answer
    x = 324,656.73

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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.