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Finding the Fourth Proportional to 713,616.69, 984,804.54 and 391,307.56

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Solution

The fourth proportional to 713,616.69, 984,804.54 and 391,307.56 is: 540,011.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,616.69 : 984,804.54 = 391,307.56 : x
  2. Step 2: Convert to fraction form
    713,616.69/984,804.54 = 391,307.56/x
  3. Step 3: Cross multiply
    713,616.69x = 984,804.54 × 391,307.56
  4. Step 4: Simplify right side
    713,616.69x = 385,361,461,624.32
  5. Step 5: Solve for x
    x = 385,361,461,624.32/713,616.69
  6. Step 6: Final answer
    x = 540,011.84

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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.