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Finding the Fourth Proportional to 260,021.04, 389,943.72 and 72,988.08

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Solution

The fourth proportional to 260,021.04, 389,943.72 and 72,988.08 is: 109,457.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    260,021.04 : 389,943.72 = 72,988.08 : x
  2. Step 2: Convert to fraction form
    260,021.04/389,943.72 = 72,988.08/x
  3. Step 3: Cross multiply
    260,021.04x = 389,943.72 × 72,988.08
  4. Step 4: Simplify right side
    260,021.04x = 28,461,243,430.86
  5. Step 5: Solve for x
    x = 28,461,243,430.86/260,021.04
  6. Step 6: Final answer
    x = 109,457.46

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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.