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Finding the Fourth Proportional to 713,015.13, 983,960.89 and 390,737.91

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Solution

The fourth proportional to 713,015.13, 983,960.89 and 390,737.91 is: 539,218.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,015.13 : 983,960.89 = 390,737.91 : x
  2. Step 2: Convert to fraction form
    713,015.13/983,960.89 = 390,737.91/x
  3. Step 3: Cross multiply
    713,015.13x = 983,960.89 × 390,737.91
  4. Step 4: Simplify right side
    713,015.13x = 384,470,821,680.34
  5. Step 5: Solve for x
    x = 384,470,821,680.34/713,015.13
  6. Step 6: Final answer
    x = 539,218.32

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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.