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Finding the Fourth Proportional to 570,842.01, 787,762.31 and 312,728.34

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Solution

The fourth proportional to 570,842.01, 787,762.31 and 312,728.34 is: 431,565.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,842.01 : 787,762.31 = 312,728.34 : x
  2. Step 2: Convert to fraction form
    570,842.01/787,762.31 = 312,728.34/x
  3. Step 3: Cross multiply
    570,842.01x = 787,762.31 × 312,728.34
  4. Step 4: Simplify right side
    570,842.01x = 246,355,599,520.87
  5. Step 5: Solve for x
    x = 246,355,599,520.87/570,842.01
  6. Step 6: Final answer
    x = 431,565.29

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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.