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Finding the Fourth Proportional to 312,272.24, 468,421.32 and 90,656.24

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Solution

The fourth proportional to 312,272.24, 468,421.32 and 90,656.24 is: 135,988.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,272.24 : 468,421.32 = 90,656.24 : x
  2. Step 2: Convert to fraction form
    312,272.24/468,421.32 = 90,656.24/x
  3. Step 3: Cross multiply
    312,272.24x = 468,421.32 × 90,656.24
  4. Step 4: Simplify right side
    312,272.24x = 42,465,315,607.04
  5. Step 5: Solve for x
    x = 42,465,315,607.04/312,272.24
  6. Step 6: Final answer
    x = 135,988.12

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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.