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Finding the Fourth Proportional to 432,079.80, 648,119.70 and 290,362.20

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Solution

The fourth proportional to 432,079.80, 648,119.70 and 290,362.20 is: 435,543.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    432,079.80 : 648,119.70 = 290,362.20 : x
  2. Step 2: Convert to fraction form
    432,079.80/648,119.70 = 290,362.20/x
  3. Step 3: Cross multiply
    432,079.80x = 648,119.70 × 290,362.20
  4. Step 4: Simplify right side
    432,079.80x = 188,189,461,955.34
  5. Step 5: Solve for x
    x = 188,189,461,955.34/432,079.80
  6. Step 6: Final answer
    x = 435,543.30

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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.