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Finding the Fourth Proportional to 421,587.05, 632,629.71 and 155,534.45

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Solution

The fourth proportional to 421,587.05, 632,629.71 and 155,534.45 is: 233,393.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,587.05 : 632,629.71 = 155,534.45 : x
  2. Step 2: Convert to fraction form
    421,587.05/632,629.71 = 155,534.45/x
  3. Step 3: Cross multiply
    421,587.05x = 632,629.71 × 155,534.45
  4. Step 4: Simplify right side
    421,587.05x = 98,395,710,835.36
  5. Step 5: Solve for x
    x = 98,395,710,835.36/421,587.05
  6. Step 6: Final answer
    x = 233,393.58

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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.