Home / 387,905,805.08-535,615,019.48-312,312,006.53

Finding the Fourth Proportional to 387,905,805.08, 535,615,019.48 and 312,312,006.53

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Solution

The fourth proportional to 387,905,805.08, 535,615,019.48 and 312,312,006.53 is: 431,236,138.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,905,805.08 : 535,615,019.48 = 312,312,006.53 : x
  2. Step 2: Convert to fraction form
    387,905,805.08/535,615,019.48 = 312,312,006.53/x
  3. Step 3: Cross multiply
    387,905,805.08x = 535,615,019.48 × 312,312,006.53
  4. Step 4: Simplify right side
    387,905,805.08x = 167,279,001,461,403,840
  5. Step 5: Solve for x
    x = 167,279,001,461,403,840/387,905,805.08
  6. Step 6: Final answer
    x = 431,236,138.44

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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.