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Finding the Fourth Proportional to 520,389.77, 718,139.07 and 290,955.24

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Solution

The fourth proportional to 520,389.77, 718,139.07 and 290,955.24 is: 401,518.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,389.77 : 718,139.07 = 290,955.24 : x
  2. Step 2: Convert to fraction form
    520,389.77/718,139.07 = 290,955.24/x
  3. Step 3: Cross multiply
    520,389.77x = 718,139.07 × 290,955.24
  4. Step 4: Simplify right side
    520,389.77x = 208,946,325,465.23
  5. Step 5: Solve for x
    x = 208,946,325,465.23/520,389.77
  6. Step 6: Final answer
    x = 401,518.90

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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.