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Finding the Fourth Proportional to 387,643.36, 581,690.64 and 162,987.52

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Solution

The fourth proportional to 387,643.36, 581,690.64 and 162,987.52 is: 244,576.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,643.36 : 581,690.64 = 162,987.52 : x
  2. Step 2: Convert to fraction form
    387,643.36/581,690.64 = 162,987.52/x
  3. Step 3: Cross multiply
    387,643.36x = 581,690.64 × 162,987.52
  4. Step 4: Simplify right side
    387,643.36x = 94,808,314,820.81
  5. Step 5: Solve for x
    x = 94,808,314,820.81/387,643.36
  6. Step 6: Final answer
    x = 244,576.14

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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.