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Finding the Fourth Proportional to 390,848.40, 586,272.60 and 264,877.20

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Solution

The fourth proportional to 390,848.40, 586,272.60 and 264,877.20 is: 397,315.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,848.40 : 586,272.60 = 264,877.20 : x
  2. Step 2: Convert to fraction form
    390,848.40/586,272.60 = 264,877.20/x
  3. Step 3: Cross multiply
    390,848.40x = 586,272.60 × 264,877.20
  4. Step 4: Simplify right side
    390,848.40x = 155,290,244,724.72
  5. Step 5: Solve for x
    x = 155,290,244,724.72/390,848.40
  6. Step 6: Final answer
    x = 397,315.80

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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.