Home / 528,005.20-792,007.80-212,688.40

Finding the Fourth Proportional to 528,005.20, 792,007.80 and 212,688.40

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Solution

The fourth proportional to 528,005.20, 792,007.80 and 212,688.40 is: 319,032.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,005.20 : 792,007.80 = 212,688.40 : x
  2. Step 2: Convert to fraction form
    528,005.20/792,007.80 = 212,688.40/x
  3. Step 3: Cross multiply
    528,005.20x = 792,007.80 × 212,688.40
  4. Step 4: Simplify right side
    528,005.20x = 168,450,871,769.52
  5. Step 5: Solve for x
    x = 168,450,871,769.52/528,005.20
  6. Step 6: Final answer
    x = 319,032.60

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.