Home / 387,905,803.08-535,615,016.72-312,312,004.53

Finding the Fourth Proportional to 387,905,803.08, 535,615,016.72 and 312,312,004.53

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Solution

The fourth proportional to 387,905,803.08, 535,615,016.72 and 312,312,004.53 is: 431,236,135.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,905,803.08 : 535,615,016.72 = 312,312,004.53 : x
  2. Step 2: Convert to fraction form
    387,905,803.08/535,615,016.72 = 312,312,004.53/x
  3. Step 3: Cross multiply
    387,905,803.08x = 535,615,016.72 × 312,312,004.53
  4. Step 4: Simplify right side
    387,905,803.08x = 167,278,999,526,631,072
  5. Step 5: Solve for x
    x = 167,278,999,526,631,072/387,905,803.08
  6. Step 6: Final answer
    x = 431,236,135.68

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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.