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Finding the Fourth Proportional to 528,857.81, 730,424.67 and 356,478.47

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Solution

The fourth proportional to 528,857.81, 730,424.67 and 356,478.47 is: 492,345.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,857.81 : 730,424.67 = 356,478.47 : x
  2. Step 2: Convert to fraction form
    528,857.81/730,424.67 = 356,478.47/x
  3. Step 3: Cross multiply
    528,857.81x = 730,424.67 × 356,478.47
  4. Step 4: Simplify right side
    528,857.81x = 260,380,665,159.73
  5. Step 5: Solve for x
    x = 260,380,665,159.73/528,857.81
  6. Step 6: Final answer
    x = 492,345.32

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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.