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Finding the Fourth Proportional to 570,526.78, 787,323.96 and 312,399.04

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Solution

The fourth proportional to 570,526.78, 787,323.96 and 312,399.04 is: 431,109.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,526.78 : 787,323.96 = 312,399.04 : x
  2. Step 2: Convert to fraction form
    570,526.78/787,323.96 = 312,399.04/x
  3. Step 3: Cross multiply
    570,526.78x = 787,323.96 × 312,399.04
  4. Step 4: Simplify right side
    570,526.78x = 245,959,249,273.00
  5. Step 5: Solve for x
    x = 245,959,249,273.00/570,526.78
  6. Step 6: Final answer
    x = 431,109.03

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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.