Home / 387,905,804.08-535,615,018.10-312,312,005.53

Finding the Fourth Proportional to 387,905,804.08, 535,615,018.10 and 312,312,005.53

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Solution

The fourth proportional to 387,905,804.08, 535,615,018.10 and 312,312,005.53 is: 431,236,137.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,905,804.08 : 535,615,018.10 = 312,312,005.53 : x
  2. Step 2: Convert to fraction form
    387,905,804.08/535,615,018.10 = 312,312,005.53/x
  3. Step 3: Cross multiply
    387,905,804.08x = 535,615,018.10 × 312,312,005.53
  4. Step 4: Simplify right side
    387,905,804.08x = 167,279,000,494,798,240
  5. Step 5: Solve for x
    x = 167,279,000,494,798,240/387,905,804.08
  6. Step 6: Final answer
    x = 431,236,137.06

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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.