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Finding the Fourth Proportional to 713,428.61, 983,968.05 and 631,842.58

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Solution

The fourth proportional to 713,428.61, 983,968.05 and 631,842.58 is: 871,443.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,428.61 : 983,968.05 = 631,842.58 : x
  2. Step 2: Convert to fraction form
    713,428.61/983,968.05 = 631,842.58/x
  3. Step 3: Cross multiply
    713,428.61x = 983,968.05 × 631,842.58
  4. Step 4: Simplify right side
    713,428.61x = 621,712,908,889.65
  5. Step 5: Solve for x
    x = 621,712,908,889.65/713,428.61
  6. Step 6: Final answer
    x = 871,443.75

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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.