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Finding the Fourth Proportional to 330,010.40, 495,015.60 and 310,656.80

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Solution

The fourth proportional to 330,010.40, 495,015.60 and 310,656.80 is: 465,985.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    330,010.40 : 495,015.60 = 310,656.80 : x
  2. Step 2: Convert to fraction form
    330,010.40/495,015.60 = 310,656.80/x
  3. Step 3: Cross multiply
    330,010.40x = 495,015.60 × 310,656.80
  4. Step 4: Simplify right side
    330,010.40x = 153,779,962,246.08
  5. Step 5: Solve for x
    x = 153,779,962,246.08/330,010.40
  6. Step 6: Final answer
    x = 465,985.20

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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.