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Finding the Fourth Proportional to 528,060.10, 728,721.48 and 286,341.93

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Solution

The fourth proportional to 528,060.10, 728,721.48 and 286,341.93 is: 395,151.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,060.10 : 728,721.48 = 286,341.93 : x
  2. Step 2: Convert to fraction form
    528,060.10/728,721.48 = 286,341.93/x
  3. Step 3: Cross multiply
    528,060.10x = 728,721.48 × 286,341.93
  4. Step 4: Simplify right side
    528,060.10x = 208,663,515,015.66
  5. Step 5: Solve for x
    x = 208,663,515,015.66/528,060.10
  6. Step 6: Final answer
    x = 395,151.07

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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.