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Finding the Fourth Proportional to 355,643.60, 533,465.40 and 89,412.80

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Solution

The fourth proportional to 355,643.60, 533,465.40 and 89,412.80 is: 134,119.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    355,643.60 : 533,465.40 = 89,412.80 : x
  2. Step 2: Convert to fraction form
    355,643.60/533,465.40 = 89,412.80/x
  3. Step 3: Cross multiply
    355,643.60x = 533,465.40 × 89,412.80
  4. Step 4: Simplify right side
    355,643.60x = 47,698,635,117.12
  5. Step 5: Solve for x
    x = 47,698,635,117.12/355,643.60
  6. Step 6: Final answer
    x = 134,119.20

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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.