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Finding the Fourth Proportional to 505,756.72, 697,916.28 and 290,900.40

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Solution

The fourth proportional to 505,756.72, 697,916.28 and 290,900.40 is: 401,426.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    505,756.72 : 697,916.28 = 290,900.40 : x
  2. Step 2: Convert to fraction form
    505,756.72/697,916.28 = 290,900.40/x
  3. Step 3: Cross multiply
    505,756.72x = 697,916.28 × 290,900.40
  4. Step 4: Simplify right side
    505,756.72x = 203,024,125,018.51
  5. Step 5: Solve for x
    x = 203,024,125,018.51/505,756.72
  6. Step 6: Final answer
    x = 401,426.45

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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.