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Finding the Fourth Proportional to 676,747.68, 933,849.68 and 390,212.40

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Solution

The fourth proportional to 676,747.68, 933,849.68 and 390,212.40 is: 538,457.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    676,747.68 : 933,849.68 = 390,212.40 : x
  2. Step 2: Convert to fraction form
    676,747.68/933,849.68 = 390,212.40/x
  3. Step 3: Cross multiply
    676,747.68x = 933,849.68 × 390,212.40
  4. Step 4: Simplify right side
    676,747.68x = 364,399,724,872.03
  5. Step 5: Solve for x
    x = 364,399,724,872.03/676,747.68
  6. Step 6: Final answer
    x = 538,457.29

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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.