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Finding the Fourth Proportional to 530,486.72, 732,069.60 and 288,782.72

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Solution

The fourth proportional to 530,486.72, 732,069.60 and 288,782.72 is: 398,519.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    530,486.72 : 732,069.60 = 288,782.72 : x
  2. Step 2: Convert to fraction form
    530,486.72/732,069.60 = 288,782.72/x
  3. Step 3: Cross multiply
    530,486.72x = 732,069.60 × 288,782.72
  4. Step 4: Simplify right side
    530,486.72x = 211,409,050,317.31
  5. Step 5: Solve for x
    x = 211,409,050,317.31/530,486.72
  6. Step 6: Final answer
    x = 398,519.02

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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.