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Finding the Fourth Proportional to 387,547.98, 534,860.46 and 215,483.06

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Solution

The fourth proportional to 387,547.98, 534,860.46 and 215,483.06 is: 297,391.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,547.98 : 534,860.46 = 215,483.06 : x
  2. Step 2: Convert to fraction form
    387,547.98/534,860.46 = 215,483.06/x
  3. Step 3: Cross multiply
    387,547.98x = 534,860.46 × 215,483.06
  4. Step 4: Simplify right side
    387,547.98x = 115,253,365,919.51
  5. Step 5: Solve for x
    x = 115,253,365,919.51/387,547.98
  6. Step 6: Final answer
    x = 297,391.22

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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.