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Finding the Fourth Proportional to 528,509.43, 729,339.31 and 286,785.85

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Solution

The fourth proportional to 528,509.43, 729,339.31 and 286,785.85 is: 395,762.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,509.43 : 729,339.31 = 286,785.85 : x
  2. Step 2: Convert to fraction form
    528,509.43/729,339.31 = 286,785.85/x
  3. Step 3: Cross multiply
    528,509.43x = 729,339.31 × 286,785.85
  4. Step 4: Simplify right side
    528,509.43x = 209,164,192,522.83
  5. Step 5: Solve for x
    x = 209,164,192,522.83/528,509.43
  6. Step 6: Final answer
    x = 395,762.46

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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.