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Finding the Fourth Proportional to 290,430.30, 435,445.65 and 147,999.90

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Solution

The fourth proportional to 290,430.30, 435,445.65 and 147,999.90 is: 221,898.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,430.30 : 435,445.65 = 147,999.90 : x
  2. Step 2: Convert to fraction form
    290,430.30/435,445.65 = 147,999.90/x
  3. Step 3: Cross multiply
    290,430.30x = 435,445.65 × 147,999.90
  4. Step 4: Simplify right side
    290,430.30x = 64,445,912,655.44
  5. Step 5: Solve for x
    x = 64,445,912,655.44/290,430.30
  6. Step 6: Final answer
    x = 221,898.03

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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.