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Finding the Fourth Proportional to 391,501.86, 540,532.85 and 300,695.49

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Solution

The fourth proportional to 391,501.86, 540,532.85 and 300,695.49 is: 415,159.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,501.86 : 540,532.85 = 300,695.49 : x
  2. Step 2: Convert to fraction form
    391,501.86/540,532.85 = 300,695.49/x
  3. Step 3: Cross multiply
    391,501.86x = 540,532.85 × 300,695.49
  4. Step 4: Simplify right side
    391,501.86x = 162,535,788,688.37
  5. Step 5: Solve for x
    x = 162,535,788,688.37/391,501.86
  6. Step 6: Final answer
    x = 415,159.69

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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.