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Finding the Fourth Proportional to 528,254.32, 728,986.65 and 286,536.28

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Solution

The fourth proportional to 528,254.32, 728,986.65 and 286,536.28 is: 395,417.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,254.32 : 728,986.65 = 286,536.28 : x
  2. Step 2: Convert to fraction form
    528,254.32/728,986.65 = 286,536.28/x
  3. Step 3: Cross multiply
    528,254.32x = 728,986.65 × 286,536.28
  4. Step 4: Simplify right side
    528,254.32x = 208,881,122,860.66
  5. Step 5: Solve for x
    x = 208,881,122,860.66/528,254.32
  6. Step 6: Final answer
    x = 395,417.73

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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.