Home / 390,533,981.72-538,901,273.34-231,736,740.35

Finding the Fourth Proportional to 390,533,981.72, 538,901,273.34 and 231,736,740.35

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Solution

The fourth proportional to 390,533,981.72, 538,901,273.34 and 231,736,740.35 is: 319,775,564.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,533,981.72 : 538,901,273.34 = 231,736,740.35 : x
  2. Step 2: Convert to fraction form
    390,533,981.72/538,901,273.34 = 231,736,740.35/x
  3. Step 3: Cross multiply
    390,533,981.72x = 538,901,273.34 × 231,736,740.35
  4. Step 4: Simplify right side
    390,533,981.72x = 124,883,224,454,275,968
  5. Step 5: Solve for x
    x = 124,883,224,454,275,968/390,533,981.72
  6. Step 6: Final answer
    x = 319,775,564.48

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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.