Home / 679,923.17-938,226.74-389,478.98

Finding the Fourth Proportional to 679,923.17, 938,226.74 and 389,478.98

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Solution

The fourth proportional to 679,923.17, 938,226.74 and 389,478.98 is: 537,442.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,923.17 : 938,226.74 = 389,478.98 : x
  2. Step 2: Convert to fraction form
    679,923.17/938,226.74 = 389,478.98/x
  3. Step 3: Cross multiply
    679,923.17x = 938,226.74 × 389,478.98
  4. Step 4: Simplify right side
    679,923.17x = 365,419,588,525.94
  5. Step 5: Solve for x
    x = 365,419,588,525.94/679,923.17
  6. Step 6: Final answer
    x = 537,442.47

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.