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Finding the Fourth Proportional to 713,089.36, 984,064.71 and 390,811.42

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Solution

The fourth proportional to 713,089.36, 984,064.71 and 390,811.42 is: 539,320.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,089.36 : 984,064.71 = 390,811.42 : x
  2. Step 2: Convert to fraction form
    713,089.36/984,064.71 = 390,811.42/x
  3. Step 3: Cross multiply
    713,089.36x = 984,064.71 × 390,811.42
  4. Step 4: Simplify right side
    713,089.36x = 384,583,726,686.99
  5. Step 5: Solve for x
    x = 384,583,726,686.99/713,089.36
  6. Step 6: Final answer
    x = 539,320.52

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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.