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Finding the Fourth Proportional to 713,205.93, 984,248.57 and 390,915.95

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Solution

The fourth proportional to 713,205.93, 984,248.57 and 390,915.95 is: 539,477.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,205.93 : 984,248.57 = 390,915.95 : x
  2. Step 2: Convert to fraction form
    713,205.93/984,248.57 = 390,915.95/x
  3. Step 3: Cross multiply
    713,205.93x = 984,248.57 × 390,915.95
  4. Step 4: Simplify right side
    713,205.93x = 384,758,462,823.11
  5. Step 5: Solve for x
    x = 384,758,462,823.11/713,205.93
  6. Step 6: Final answer
    x = 539,477.37

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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.