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Finding the Fourth Proportional to 497,015.10, 745,522.65 and 319,722.30

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Solution

The fourth proportional to 497,015.10, 745,522.65 and 319,722.30 is: 479,583.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    497,015.10 : 745,522.65 = 319,722.30 : x
  2. Step 2: Convert to fraction form
    497,015.10/745,522.65 = 319,722.30/x
  3. Step 3: Cross multiply
    497,015.10x = 745,522.65 × 319,722.30
  4. Step 4: Simplify right side
    497,015.10x = 238,360,216,360.10
  5. Step 5: Solve for x
    x = 238,360,216,360.10/497,015.10
  6. Step 6: Final answer
    x = 479,583.45

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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.