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Finding the Fourth Proportional to 570,509.17, 787,302.71 and 312,402.39

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Solution

The fourth proportional to 570,509.17, 787,302.71 and 312,402.39 is: 431,115.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,509.17 : 787,302.71 = 312,402.39 : x
  2. Step 2: Convert to fraction form
    570,509.17/787,302.71 = 312,402.39/x
  3. Step 3: Cross multiply
    570,509.17x = 787,302.71 × 312,402.39
  4. Step 4: Simplify right side
    570,509.17x = 245,955,248,257.48
  5. Step 5: Solve for x
    x = 245,955,248,257.48/570,509.17
  6. Step 6: Final answer
    x = 431,115.33

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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.