Home / 674,649.18-931,123.08-388,113.30

Finding the Fourth Proportional to 674,649.18, 931,123.08 and 388,113.30

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Solution

The fourth proportional to 674,649.18, 931,123.08 and 388,113.30 is: 535,658.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,649.18 : 931,123.08 = 388,113.30 : x
  2. Step 2: Convert to fraction form
    674,649.18/931,123.08 = 388,113.30/x
  3. Step 3: Cross multiply
    674,649.18x = 931,123.08 × 388,113.30
  4. Step 4: Simplify right side
    674,649.18x = 361,381,251,284.96
  5. Step 5: Solve for x
    x = 361,381,251,284.96/674,649.18
  6. Step 6: Final answer
    x = 535,658.03

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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.