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Finding the Fourth Proportional to 676,292, 933,281.28 and 389,809.76

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Solution

The fourth proportional to 676,292, 933,281.28 and 389,809.76 is: 537,936.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    676,292 : 933,281.28 = 389,809.76 : x
  2. Step 2: Convert to fraction form
    676,292/933,281.28 = 389,809.76/x
  3. Step 3: Cross multiply
    676,292x = 933,281.28 × 389,809.76
  4. Step 4: Simplify right side
    676,292x = 363,802,151,769.29
  5. Step 5: Solve for x
    x = 363,802,151,769.29/676,292
  6. Step 6: Final answer
    x = 537,936.50

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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.