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Finding the Fourth Proportional to 539,520.40, 744,480.48 and 310,031.20

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Solution

The fourth proportional to 539,520.40, 744,480.48 and 310,031.20 is: 427,809.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    539,520.40 : 744,480.48 = 310,031.20 : x
  2. Step 2: Convert to fraction form
    539,520.40/744,480.48 = 310,031.20/x
  3. Step 3: Cross multiply
    539,520.40x = 744,480.48 × 310,031.20
  4. Step 4: Simplify right side
    539,520.40x = 230,812,176,590.98
  5. Step 5: Solve for x
    x = 230,812,176,590.98/539,520.40
  6. Step 6: Final answer
    x = 427,809.92

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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.