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Finding the Fourth Proportional to 305,655.20, 458,482.80 and 288,159.20

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Solution

The fourth proportional to 305,655.20, 458,482.80 and 288,159.20 is: 432,238.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,655.20 : 458,482.80 = 288,159.20 : x
  2. Step 2: Convert to fraction form
    305,655.20/458,482.80 = 288,159.20/x
  3. Step 3: Cross multiply
    305,655.20x = 458,482.80 × 288,159.20
  4. Step 4: Simplify right side
    305,655.20x = 132,116,036,861.76
  5. Step 5: Solve for x
    x = 132,116,036,861.76/305,655.20
  6. Step 6: Final answer
    x = 432,238.80

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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.