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Finding the Fourth Proportional to 570,507.22, 787,300.01 and 312,400.45

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Solution

The fourth proportional to 570,507.22, 787,300.01 and 312,400.45 is: 431,112.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,507.22 : 787,300.01 = 312,400.45 : x
  2. Step 2: Convert to fraction form
    570,507.22/787,300.01 = 312,400.45/x
  3. Step 3: Cross multiply
    570,507.22x = 787,300.01 × 312,400.45
  4. Step 4: Simplify right side
    570,507.22x = 245,952,877,409.01
  5. Step 5: Solve for x
    x = 245,952,877,409.01/570,507.22
  6. Step 6: Final answer
    x = 431,112.65

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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.