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Finding the Fourth Proportional to 289,695.60, 434,543.40 and 243,039.60

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Solution

The fourth proportional to 289,695.60, 434,543.40 and 243,039.60 is: 364,559.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,695.60 : 434,543.40 = 243,039.60 : x
  2. Step 2: Convert to fraction form
    289,695.60/434,543.40 = 243,039.60/x
  3. Step 3: Cross multiply
    289,695.60x = 434,543.40 × 243,039.60
  4. Step 4: Simplify right side
    289,695.60x = 105,611,254,118.64
  5. Step 5: Solve for x
    x = 105,611,254,118.64/289,695.60
  6. Step 6: Final answer
    x = 364,559.40

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1.5x scale

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.