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Finding the Fourth Proportional to 718,023.48, 990,859.53 and 391,339.42

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Solution

The fourth proportional to 718,023.48, 990,859.53 and 391,339.42 is: 540,041.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    718,023.48 : 990,859.53 = 391,339.42 : x
  2. Step 2: Convert to fraction form
    718,023.48/990,859.53 = 391,339.42/x
  3. Step 3: Cross multiply
    718,023.48x = 990,859.53 × 391,339.42
  4. Step 4: Simplify right side
    718,023.48x = 387,762,393,771.67
  5. Step 5: Solve for x
    x = 387,762,393,771.67/718,023.48
  6. Step 6: Final answer
    x = 540,041.38

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.