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Finding the Fourth Proportional to 520,053.80, 780,663.90 and 402,247.40

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Solution

The fourth proportional to 520,053.80, 780,663.90 and 402,247.40 is: 603,822.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,053.80 : 780,663.90 = 402,247.40 : x
  2. Step 2: Convert to fraction form
    520,053.80/780,663.90 = 402,247.40/x
  3. Step 3: Cross multiply
    520,053.80x = 780,663.90 × 402,247.40
  4. Step 4: Simplify right side
    520,053.80x = 314,020,024,048.86
  5. Step 5: Solve for x
    x = 314,020,024,048.86/520,053.80
  6. Step 6: Final answer
    x = 603,822.19

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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.