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Finding the Fourth Proportional to 528,118.48, 728,802.04 and 286,400.30

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Solution

The fourth proportional to 528,118.48, 728,802.04 and 286,400.30 is: 395,231.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,118.48 : 728,802.04 = 286,400.30 : x
  2. Step 2: Convert to fraction form
    528,118.48/728,802.04 = 286,400.30/x
  3. Step 3: Cross multiply
    528,118.48x = 728,802.04 × 286,400.30
  4. Step 4: Simplify right side
    528,118.48x = 208,729,121,464.61
  5. Step 5: Solve for x
    x = 208,729,121,464.61/528,118.48
  6. Step 6: Final answer
    x = 395,231.62

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1.5x scale

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.