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Finding the Fourth Proportional to 713,663.84, 984,869.62 and 391,353.50

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Solution

The fourth proportional to 713,663.84, 984,869.62 and 391,353.50 is: 540,075.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,663.84 : 984,869.62 = 391,353.50 : x
  2. Step 2: Convert to fraction form
    713,663.84/984,869.62 = 391,353.50/x
  3. Step 3: Cross multiply
    713,663.84x = 984,869.62 × 391,353.50
  4. Step 4: Simplify right side
    713,663.84x = 385,432,172,830.67
  5. Step 5: Solve for x
    x = 385,432,172,830.67/713,663.84
  6. Step 6: Final answer
    x = 540,075.24

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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.