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Finding the Fourth Proportional to 575,897.70, 863,846.55 and 386,940.90

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Solution

The fourth proportional to 575,897.70, 863,846.55 and 386,940.90 is: 580,411.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    575,897.70 : 863,846.55 = 386,940.90 : x
  2. Step 2: Convert to fraction form
    575,897.70/863,846.55 = 386,940.90/x
  3. Step 3: Cross multiply
    575,897.70x = 863,846.55 × 386,940.90
  4. Step 4: Simplify right side
    575,897.70x = 334,257,561,518.90
  5. Step 5: Solve for x
    x = 334,257,561,518.90/575,897.70
  6. Step 6: Final answer
    x = 580,411.35

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Double scale
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Similar ratio
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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.