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Finding the Fourth Proportional to 507,670.20, 761,506.98 and 128,590.80

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Solution

The fourth proportional to 507,670.20, 761,506.98 and 128,590.80 is: 192,886.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    507,670.20 : 761,506.98 = 128,590.80 : x
  2. Step 2: Convert to fraction form
    507,670.20/761,506.98 = 128,590.80/x
  3. Step 3: Cross multiply
    507,670.20x = 761,506.98 × 128,590.80
  4. Step 4: Simplify right side
    507,670.20x = 97,922,791,763.78
  5. Step 5: Solve for x
    x = 97,922,791,763.78/507,670.20
  6. Step 6: Final answer
    x = 192,886.63

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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.