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Finding the Fourth Proportional to 328,987.20, 493,480.80 and 118,646.40

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Solution

The fourth proportional to 328,987.20, 493,480.80 and 118,646.40 is: 177,969.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    328,987.20 : 493,480.80 = 118,646.40 : x
  2. Step 2: Convert to fraction form
    328,987.20/493,480.80 = 118,646.40/x
  3. Step 3: Cross multiply
    328,987.20x = 493,480.80 × 118,646.40
  4. Step 4: Simplify right side
    328,987.20x = 58,549,720,389.12
  5. Step 5: Solve for x
    x = 58,549,720,389.12/328,987.20
  6. Step 6: Final answer
    x = 177,969.60

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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.