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Finding the Fourth Proportional to 520,043.30, 780,064.95 and 319,714.10

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Solution

The fourth proportional to 520,043.30, 780,064.95 and 319,714.10 is: 479,571.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,043.30 : 780,064.95 = 319,714.10 : x
  2. Step 2: Convert to fraction form
    520,043.30/780,064.95 = 319,714.10/x
  3. Step 3: Cross multiply
    520,043.30x = 780,064.95 × 319,714.10
  4. Step 4: Simplify right side
    520,043.30x = 249,397,763,430.80
  5. Step 5: Solve for x
    x = 249,397,763,430.80/520,043.30
  6. Step 6: Final answer
    x = 479,571.15

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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.