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Finding the Fourth Proportional to 561,131.12, 772,730 and 487,509.51

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Solution

The fourth proportional to 561,131.12, 772,730 and 487,509.51 is: 671,346.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,131.12 : 772,730 = 487,509.51 : x
  2. Step 2: Convert to fraction form
    561,131.12/772,730 = 487,509.51/x
  3. Step 3: Cross multiply
    561,131.12x = 772,730 × 487,509.51
  4. Step 4: Simplify right side
    561,131.12x = 376,713,223,662.30
  5. Step 5: Solve for x
    x = 376,713,223,662.30/561,131.12
  6. Step 6: Final answer
    x = 671,346.16

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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.