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Finding the Fourth Proportional to 478,539.40, 717,809.10 and 434,252.65

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Solution

The fourth proportional to 478,539.40, 717,809.10 and 434,252.65 is: 651,378.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,539.40 : 717,809.10 = 434,252.65 : x
  2. Step 2: Convert to fraction form
    478,539.40/717,809.10 = 434,252.65/x
  3. Step 3: Cross multiply
    478,539.40x = 717,809.10 × 434,252.65
  4. Step 4: Simplify right side
    478,539.40x = 311,710,503,869.12
  5. Step 5: Solve for x
    x = 311,710,503,869.12/478,539.40
  6. Step 6: Final answer
    x = 651,378.98

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Similar ratio
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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.