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Finding the Fourth Proportional to 672,658.49, 928,291.08 and 400,689.25

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Solution

The fourth proportional to 672,658.49, 928,291.08 and 400,689.25 is: 552,964.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,658.49 : 928,291.08 = 400,689.25 : x
  2. Step 2: Convert to fraction form
    672,658.49/928,291.08 = 400,689.25/x
  3. Step 3: Cross multiply
    672,658.49x = 928,291.08 × 400,689.25
  4. Step 4: Simplify right side
    672,658.49x = 371,956,256,626.89
  5. Step 5: Solve for x
    x = 371,956,256,626.89/672,658.49
  6. Step 6: Final answer
    x = 552,964.49

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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.