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Finding the Fourth Proportional to 292,802.40, 439,203.60 and 143,138.70

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Solution

The fourth proportional to 292,802.40, 439,203.60 and 143,138.70 is: 214,708.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,802.40 : 439,203.60 = 143,138.70 : x
  2. Step 2: Convert to fraction form
    292,802.40/439,203.60 = 143,138.70/x
  3. Step 3: Cross multiply
    292,802.40x = 439,203.60 × 143,138.70
  4. Step 4: Simplify right side
    292,802.40x = 62,867,032,339.32
  5. Step 5: Solve for x
    x = 62,867,032,339.32/292,802.40
  6. Step 6: Final answer
    x = 214,708.05

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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.