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Finding the Fourth Proportional to 390,875.90, 586,399.91 and 222,475.48

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Solution

The fourth proportional to 390,875.90, 586,399.91 and 222,475.48 is: 333,762.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,875.90 : 586,399.91 = 222,475.48 : x
  2. Step 2: Convert to fraction form
    390,875.90/586,399.91 = 222,475.48/x
  3. Step 3: Cross multiply
    390,875.90x = 586,399.91 × 222,475.48
  4. Step 4: Simplify right side
    390,875.90x = 130,459,598,870.83
  5. Step 5: Solve for x
    x = 130,459,598,870.83/390,875.90
  6. Step 6: Final answer
    x = 333,762.20

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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.