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Finding the Fourth Proportional to 713,195.81, 984,208.19 and 390,904.91

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Solution

The fourth proportional to 713,195.81, 984,208.19 and 390,904.91 is: 539,447.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,195.81 : 984,208.19 = 390,904.91 : x
  2. Step 2: Convert to fraction form
    713,195.81/984,208.19 = 390,904.91/x
  3. Step 3: Cross multiply
    713,195.81x = 984,208.19 × 390,904.91
  4. Step 4: Simplify right side
    713,195.81x = 384,731,817,371.00
  5. Step 5: Solve for x
    x = 384,731,817,371.00/713,195.81
  6. Step 6: Final answer
    x = 539,447.67

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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.