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Finding the Fourth Proportional to 690,948.80, 953,486.88 and 422,676.80

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Solution

The fourth proportional to 690,948.80, 953,486.88 and 422,676.80 is: 583,280.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,948.80 : 953,486.88 = 422,676.80 : x
  2. Step 2: Convert to fraction form
    690,948.80/953,486.88 = 422,676.80/x
  3. Step 3: Cross multiply
    690,948.80x = 953,486.88 × 422,676.80
  4. Step 4: Simplify right side
    690,948.80x = 403,016,783,280.38
  5. Step 5: Solve for x
    x = 403,016,783,280.38/690,948.80
  6. Step 6: Final answer
    x = 583,280.24

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Half scale
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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.