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Finding the Fourth Proportional to 720,240.19, 993,951.52 and 397,971.16

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Solution

The fourth proportional to 720,240.19, 993,951.52 and 397,971.16 is: 549,211.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,240.19 : 993,951.52 = 397,971.16 : x
  2. Step 2: Convert to fraction form
    720,240.19/993,951.52 = 397,971.16/x
  3. Step 3: Cross multiply
    720,240.19x = 993,951.52 × 397,971.16
  4. Step 4: Simplify right side
    720,240.19x = 395,564,035,918.36
  5. Step 5: Solve for x
    x = 395,564,035,918.36/720,240.19
  6. Step 6: Final answer
    x = 549,211.28

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Double scale
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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.