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Finding the Fourth Proportional to 493,287.70, 739,931.55 and 392,904.40

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Solution

The fourth proportional to 493,287.70, 739,931.55 and 392,904.40 is: 589,356.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    493,287.70 : 739,931.55 = 392,904.40 : x
  2. Step 2: Convert to fraction form
    493,287.70/739,931.55 = 392,904.40/x
  3. Step 3: Cross multiply
    493,287.70x = 739,931.55 × 392,904.40
  4. Step 4: Simplify right side
    493,287.70x = 290,722,361,693.82
  5. Step 5: Solve for x
    x = 290,722,361,693.82/493,287.70
  6. Step 6: Final answer
    x = 589,356.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.