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Finding the Fourth Proportional to 528,421.94, 729,201 and 286,695.26

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Solution

The fourth proportional to 528,421.94, 729,201 and 286,695.26 is: 395,627.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,421.94 : 729,201 = 286,695.26 : x
  2. Step 2: Convert to fraction form
    528,421.94/729,201 = 286,695.26/x
  3. Step 3: Cross multiply
    528,421.94x = 729,201 × 286,695.26
  4. Step 4: Simplify right side
    528,421.94x = 209,058,470,287.26
  5. Step 5: Solve for x
    x = 209,058,470,287.26/528,421.94
  6. Step 6: Final answer
    x = 395,627.91

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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.