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Finding the Fourth Proportional to 570,628.19, 787,490.64 and 315,979.38

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Solution

The fourth proportional to 570,628.19, 787,490.64 and 315,979.38 is: 436,064.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,628.19 : 787,490.64 = 315,979.38 : x
  2. Step 2: Convert to fraction form
    570,628.19/787,490.64 = 315,979.38/x
  3. Step 3: Cross multiply
    570,628.19x = 787,490.64 × 315,979.38
  4. Step 4: Simplify right side
    570,628.19x = 248,830,804,183.00
  5. Step 5: Solve for x
    x = 248,830,804,183.00/570,628.19
  6. Step 6: Final answer
    x = 436,064.69

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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.