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Finding the Fourth Proportional to 385,401.79, 578,088.79 and 101,090.07

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Solution

The fourth proportional to 385,401.79, 578,088.79 and 101,090.07 is: 151,631.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,401.79 : 578,088.79 = 101,090.07 : x
  2. Step 2: Convert to fraction form
    385,401.79/578,088.79 = 101,090.07/x
  3. Step 3: Cross multiply
    385,401.79x = 578,088.79 × 101,090.07
  4. Step 4: Simplify right side
    385,401.79x = 58,439,036,247.32
  5. Step 5: Solve for x
    x = 58,439,036,247.32/385,401.79
  6. Step 6: Final answer
    x = 151,631.46

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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.