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Finding the Fourth Proportional to 713,050.08, 983,966.40 and 390,696

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Solution

The fourth proportional to 713,050.08, 983,966.40 and 390,696 is: 539,137.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,050.08 : 983,966.40 = 390,696 : x
  2. Step 2: Convert to fraction form
    713,050.08/983,966.40 = 390,696/x
  3. Step 3: Cross multiply
    713,050.08x = 983,966.40 × 390,696
  4. Step 4: Simplify right side
    713,050.08x = 384,431,736,614.40
  5. Step 5: Solve for x
    x = 384,431,736,614.40/713,050.08
  6. Step 6: Final answer
    x = 539,137.08

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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.