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Finding the Fourth Proportional to 570,409.59, 787,165.46 and 312,303.27

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Solution

The fourth proportional to 570,409.59, 787,165.46 and 312,303.27 is: 430,978.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,409.59 : 787,165.46 = 312,303.27 : x
  2. Step 2: Convert to fraction form
    570,409.59/787,165.46 = 312,303.27/x
  3. Step 3: Cross multiply
    570,409.59x = 787,165.46 × 312,303.27
  4. Step 4: Simplify right side
    570,409.59x = 245,834,343,253.23
  5. Step 5: Solve for x
    x = 245,834,343,253.23/570,409.59
  6. Step 6: Final answer
    x = 430,978.63

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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.