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Finding the Fourth Proportional to 330,657.60, 495,111.60 and 260,090.40

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Solution

The fourth proportional to 330,657.60, 495,111.60 and 260,090.40 is: 389,447.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,657.60 : 495,111.60 = 260,090.40 : x
  2. Step 2: Convert to fraction form
    330,657.60/495,111.60 = 260,090.40/x
  3. Step 3: Cross multiply
    330,657.60x = 495,111.60 × 260,090.40
  4. Step 4: Simplify right side
    330,657.60x = 128,773,774,088.64
  5. Step 5: Solve for x
    x = 128,773,774,088.64/330,657.60
  6. Step 6: Final answer
    x = 389,447.50

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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.