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Finding the Fourth Proportional to 528,430.80, 792,646.20 and 509,768.40

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Solution

The fourth proportional to 528,430.80, 792,646.20 and 509,768.40 is: 764,652.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,430.80 : 792,646.20 = 509,768.40 : x
  2. Step 2: Convert to fraction form
    528,430.80/792,646.20 = 509,768.40/x
  3. Step 3: Cross multiply
    528,430.80x = 792,646.20 × 509,768.40
  4. Step 4: Simplify right side
    528,430.80x = 404,065,985,140.08
  5. Step 5: Solve for x
    x = 404,065,985,140.08/528,430.80
  6. Step 6: Final answer
    x = 764,652.60

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Double scale
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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.