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Finding the Fourth Proportional to 554,297.40, 831,446.10 and 421,437.15

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Solution

The fourth proportional to 554,297.40, 831,446.10 and 421,437.15 is: 632,155.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,297.40 : 831,446.10 = 421,437.15 : x
  2. Step 2: Convert to fraction form
    554,297.40/831,446.10 = 421,437.15/x
  3. Step 3: Cross multiply
    554,297.40x = 831,446.10 × 421,437.15
  4. Step 4: Simplify right side
    554,297.40x = 350,402,274,762.62
  5. Step 5: Solve for x
    x = 350,402,274,762.62/554,297.40
  6. Step 6: Final answer
    x = 632,155.73

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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.