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Finding the Fourth Proportional to 290,406.18, 435,593.60 and 90,703.64

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Solution

The fourth proportional to 290,406.18, 435,593.60 and 90,703.64 is: 136,050.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,406.18 : 435,593.60 = 90,703.64 : x
  2. Step 2: Convert to fraction form
    290,406.18/435,593.60 = 90,703.64/x
  3. Step 3: Cross multiply
    290,406.18x = 435,593.60 × 90,703.64
  4. Step 4: Simplify right side
    290,406.18x = 39,509,925,080.70
  5. Step 5: Solve for x
    x = 39,509,925,080.70/290,406.18
  6. Step 6: Final answer
    x = 136,050.57

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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.