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Finding the Fourth Proportional to 567,422.40, 849,967.20 and 390,129.60

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Solution

The fourth proportional to 567,422.40, 849,967.20 and 390,129.60 is: 584,392.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    567,422.40 : 849,967.20 = 390,129.60 : x
  2. Step 2: Convert to fraction form
    567,422.40/849,967.20 = 390,129.60/x
  3. Step 3: Cross multiply
    567,422.40x = 849,967.20 × 390,129.60
  4. Step 4: Simplify right side
    567,422.40x = 331,597,363,749.12
  5. Step 5: Solve for x
    x = 331,597,363,749.12/567,422.40
  6. Step 6: Final answer
    x = 584,392.45

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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.