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Finding the Fourth Proportional to 528,047.80, 792,071.70 and 386,330.20

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Solution

The fourth proportional to 528,047.80, 792,071.70 and 386,330.20 is: 579,495.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,047.80 : 792,071.70 = 386,330.20 : x
  2. Step 2: Convert to fraction form
    528,047.80/792,071.70 = 386,330.20/x
  3. Step 3: Cross multiply
    528,047.80x = 792,071.70 × 386,330.20
  4. Step 4: Simplify right side
    528,047.80x = 306,001,218,275.34
  5. Step 5: Solve for x
    x = 306,001,218,275.34/528,047.80
  6. Step 6: Final answer
    x = 579,495.30

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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.