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Finding the Fourth Proportional to 678,688.90, 936,601.96 and 372,793.58

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Solution

The fourth proportional to 678,688.90, 936,601.96 and 372,793.58 is: 514,461.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,688.90 : 936,601.96 = 372,793.58 : x
  2. Step 2: Convert to fraction form
    678,688.90/936,601.96 = 372,793.58/x
  3. Step 3: Cross multiply
    678,688.90x = 936,601.96 × 372,793.58
  4. Step 4: Simplify right side
    678,688.90x = 349,159,197,703.42
  5. Step 5: Solve for x
    x = 349,159,197,703.42/678,688.90
  6. Step 6: Final answer
    x = 514,461.34

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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.