Home / 520,518,432.47-780,906,876.05-258,326,036.40

Finding the Fourth Proportional to 520,518,432.47, 780,906,876.05 and 258,326,036.40

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Solution

The fourth proportional to 520,518,432.47, 780,906,876.05 and 258,326,036.40 is: 387,553,188.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,518,432.47 : 780,906,876.05 = 258,326,036.40 : x
  2. Step 2: Convert to fraction form
    520,518,432.47/780,906,876.05 = 258,326,036.40/x
  3. Step 3: Cross multiply
    520,518,432.47x = 780,906,876.05 × 258,326,036.40
  4. Step 4: Simplify right side
    520,518,432.47x = 201,728,578,089,632,800
  5. Step 5: Solve for x
    x = 201,728,578,089,632,800/520,518,432.47
  6. Step 6: Final answer
    x = 387,553,188.34

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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.