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Finding the Fourth Proportional to 674,263.42, 930,511.80 and 387,783.70

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Solution

The fourth proportional to 674,263.42, 930,511.80 and 387,783.70 is: 535,157.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,263.42 : 930,511.80 = 387,783.70 : x
  2. Step 2: Convert to fraction form
    674,263.42/930,511.80 = 387,783.70/x
  3. Step 3: Cross multiply
    674,263.42x = 930,511.80 × 387,783.70
  4. Step 4: Simplify right side
    674,263.42x = 360,837,308,697.66
  5. Step 5: Solve for x
    x = 360,837,308,697.66/674,263.42
  6. Step 6: Final answer
    x = 535,157.77

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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.