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Finding the Fourth Proportional to 768,203.81, 1,152,820.01 and 318,925.06

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Solution

The fourth proportional to 768,203.81, 1,152,820.01 and 318,925.06 is: 478,601.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    768,203.81 : 1,152,820.01 = 318,925.06 : x
  2. Step 2: Convert to fraction form
    768,203.81/1,152,820.01 = 318,925.06/x
  3. Step 3: Cross multiply
    768,203.81x = 1,152,820.01 × 318,925.06
  4. Step 4: Simplify right side
    768,203.81x = 367,663,190,858.45
  5. Step 5: Solve for x
    x = 367,663,190,858.45/768,203.81
  6. Step 6: Final answer
    x = 478,601.10

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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.