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Finding the Fourth Proportional to 578,543.80, 867,815.70 and 369,110.20

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Solution

The fourth proportional to 578,543.80, 867,815.70 and 369,110.20 is: 553,665.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,543.80 : 867,815.70 = 369,110.20 : x
  2. Step 2: Convert to fraction form
    578,543.80/867,815.70 = 369,110.20/x
  3. Step 3: Cross multiply
    578,543.80x = 867,815.70 × 369,110.20
  4. Step 4: Simplify right side
    578,543.80x = 320,319,626,590.14
  5. Step 5: Solve for x
    x = 320,319,626,590.14/578,543.80
  6. Step 6: Final answer
    x = 553,665.30

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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.