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Finding the Fourth Proportional to 570,618.64, 855,607.80 and 390,907.16

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Solution

The fourth proportional to 570,618.64, 855,607.80 and 390,907.16 is: 586,141.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,618.64 : 855,607.80 = 390,907.16 : x
  2. Step 2: Convert to fraction form
    570,618.64/855,607.80 = 390,907.16/x
  3. Step 3: Cross multiply
    570,618.64x = 855,607.80 × 390,907.16
  4. Step 4: Simplify right side
    570,618.64x = 334,463,215,171.85
  5. Step 5: Solve for x
    x = 334,463,215,171.85/570,618.64
  6. Step 6: Final answer
    x = 586,141.41

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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.