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Finding the Fourth Proportional to 290,025.60, 435,038.39 and 90,362.12

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Solution

The fourth proportional to 290,025.60, 435,038.39 and 90,362.12 is: 135,543.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,025.60 : 435,038.39 = 90,362.12 : x
  2. Step 2: Convert to fraction form
    290,025.60/435,038.39 = 90,362.12/x
  3. Step 3: Cross multiply
    290,025.60x = 435,038.39 × 90,362.12
  4. Step 4: Simplify right side
    290,025.60x = 39,310,989,421.93
  5. Step 5: Solve for x
    x = 39,310,989,421.93/290,025.60
  6. Step 6: Final answer
    x = 135,543.17

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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.