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Finding the Fourth Proportional to 282,630.94, 390,026.17 and 155,303.80

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Solution

The fourth proportional to 282,630.94, 390,026.17 and 155,303.80 is: 214,316.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    282,630.94 : 390,026.17 = 155,303.80 : x
  2. Step 2: Convert to fraction form
    282,630.94/390,026.17 = 155,303.80/x
  3. Step 3: Cross multiply
    282,630.94x = 390,026.17 × 155,303.80
  4. Step 4: Simplify right side
    282,630.94x = 60,572,546,300.45
  5. Step 5: Solve for x
    x = 60,572,546,300.45/282,630.94
  6. Step 6: Final answer
    x = 214,316.76

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.