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Finding the Fourth Proportional to 672,869.64, 928,632.12 and 411,378.38

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Solution

The fourth proportional to 672,869.64, 928,632.12 and 411,378.38 is: 567,746.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,869.64 : 928,632.12 = 411,378.38 : x
  2. Step 2: Convert to fraction form
    672,869.64/928,632.12 = 411,378.38/x
  3. Step 3: Cross multiply
    672,869.64x = 928,632.12 × 411,378.38
  4. Step 4: Simplify right side
    672,869.64x = 382,019,174,438.11
  5. Step 5: Solve for x
    x = 382,019,174,438.11/672,869.64
  6. Step 6: Final answer
    x = 567,746.19

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Half scale
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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.