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Finding the Fourth Proportional to 713,079.72, 984,060.90 and 390,787.20

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Solution

The fourth proportional to 713,079.72, 984,060.90 and 390,787.20 is: 539,292.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,079.72 : 984,060.90 = 390,787.20 : x
  2. Step 2: Convert to fraction form
    713,079.72/984,060.90 = 390,787.20/x
  3. Step 3: Cross multiply
    713,079.72x = 984,060.90 × 390,787.20
  4. Step 4: Simplify right side
    713,079.72x = 384,558,403,740.48
  5. Step 5: Solve for x
    x = 384,558,403,740.48/713,079.72
  6. Step 6: Final answer
    x = 539,292.30

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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.