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Finding the Fourth Proportional to 339,944.10, 509,916.15 and 318,948.90

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Solution

The fourth proportional to 339,944.10, 509,916.15 and 318,948.90 is: 478,423.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,944.10 : 509,916.15 = 318,948.90 : x
  2. Step 2: Convert to fraction form
    339,944.10/509,916.15 = 318,948.90/x
  3. Step 3: Cross multiply
    339,944.10x = 509,916.15 × 318,948.90
  4. Step 4: Simplify right side
    339,944.10x = 162,637,195,134.74
  5. Step 5: Solve for x
    x = 162,637,195,134.74/339,944.10
  6. Step 6: Final answer
    x = 478,423.35

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