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Finding the Fourth Proportional to 530,436.47, 732,018.74 and 288,735.30

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Solution

The fourth proportional to 530,436.47, 732,018.74 and 288,735.30 is: 398,463.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    530,436.47 : 732,018.74 = 288,735.30 : x
  2. Step 2: Convert to fraction form
    530,436.47/732,018.74 = 288,735.30/x
  3. Step 3: Cross multiply
    530,436.47x = 732,018.74 × 288,735.30
  4. Step 4: Simplify right side
    530,436.47x = 211,359,649,055.85
  5. Step 5: Solve for x
    x = 211,359,649,055.85/530,436.47
  6. Step 6: Final answer
    x = 398,463.65

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Similar ratio
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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.