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Finding the Fourth Proportional to 528,253.32, 728,985.27 and 286,535.28

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Solution

The fourth proportional to 528,253.32, 728,985.27 and 286,535.28 is: 395,416.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,253.32 : 728,985.27 = 286,535.28 : x
  2. Step 2: Convert to fraction form
    528,253.32/728,985.27 = 286,535.28/x
  3. Step 3: Cross multiply
    528,253.32x = 728,985.27 × 286,535.28
  4. Step 4: Simplify right side
    528,253.32x = 208,879,998,455.33
  5. Step 5: Solve for x
    x = 208,879,998,455.33/528,253.32
  6. Step 6: Final answer
    x = 395,416.35

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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.