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Finding the Fourth Proportional to 520,039.30, 780,058.95 and 319,710.10

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Solution

The fourth proportional to 520,039.30, 780,058.95 and 319,710.10 is: 479,565.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,039.30 : 780,058.95 = 319,710.10 : x
  2. Step 2: Convert to fraction form
    520,039.30/780,058.95 = 319,710.10/x
  3. Step 3: Cross multiply
    520,039.30x = 780,058.95 × 319,710.10
  4. Step 4: Simplify right side
    520,039.30x = 249,392,724,910.40
  5. Step 5: Solve for x
    x = 249,392,724,910.40/520,039.30
  6. Step 6: Final answer
    x = 479,565.15

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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.