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Finding the Fourth Proportional to 720,828.32, 994,771.32 and 478,693.40

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Solution

The fourth proportional to 720,828.32, 994,771.32 and 478,693.40 is: 660,615.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,828.32 : 994,771.32 = 478,693.40 : x
  2. Step 2: Convert to fraction form
    720,828.32/994,771.32 = 478,693.40/x
  3. Step 3: Cross multiply
    720,828.32x = 994,771.32 × 478,693.40
  4. Step 4: Simplify right side
    720,828.32x = 476,190,465,393.29
  5. Step 5: Solve for x
    x = 476,190,465,393.29/720,828.32
  6. Step 6: Final answer
    x = 660,615.64

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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.