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Finding the Fourth Proportional to 350,630.40, 525,830.40 and 128,985.60

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Solution

The fourth proportional to 350,630.40, 525,830.40 and 128,985.60 is: 193,436.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    350,630.40 : 525,830.40 = 128,985.60 : x
  2. Step 2: Convert to fraction form
    350,630.40/525,830.40 = 128,985.60/x
  3. Step 3: Cross multiply
    350,630.40x = 525,830.40 × 128,985.60
  4. Step 4: Simplify right side
    350,630.40x = 67,824,549,642.24
  5. Step 5: Solve for x
    x = 67,824,549,642.24/350,630.40
  6. Step 6: Final answer
    x = 193,436.02

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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.