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Finding the Fourth Proportional to 713,015.19, 983,984.93 and 390,722.47

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Solution

The fourth proportional to 713,015.19, 983,984.93 and 390,722.47 is: 539,210.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,015.19 : 983,984.93 = 390,722.47 : x
  2. Step 2: Convert to fraction form
    713,015.19/983,984.93 = 390,722.47/x
  3. Step 3: Cross multiply
    713,015.19x = 983,984.93 × 390,722.47
  4. Step 4: Simplify right side
    713,015.19x = 384,465,019,344.01
  5. Step 5: Solve for x
    x = 384,465,019,344.01/713,015.19
  6. Step 6: Final answer
    x = 539,210.14

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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.